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Article: A Brain for Speech. Evolutionary Continuity in Primate and Human Auditory-Vocal Processing.

Aboitiz, Francisco

2018 Volume 12, Page(s) 174

Abstract: In this review article, I propose a continuous evolution from the auditory-vocal apparatus and its mechanisms of neural control in non-human primates, to the peripheral organs and the neural control of human speech. Although there is an overall ... ...

Abstract	In this review article, I propose a continuous evolution from the auditory-vocal apparatus and its mechanisms of neural control in non-human primates, to the peripheral organs and the neural control of human speech. Although there is an overall conservatism both in peripheral systems and in central neural circuits, a few changes were critical for the expansion of vocal plasticity and the elaboration of proto-speech in early humans. Two of the most relevant changes were the acquisition of direct cortical control of the vocal fold musculature and the consolidation of an auditory-vocal articulatory circuit, encompassing auditory areas in the temporoparietal junction and prefrontal and motor areas in the frontal cortex. This articulatory loop, also referred to as the phonological loop, enhanced vocal working memory capacity, enabling early humans to learn increasingly complex utterances. The auditory-vocal circuit became progressively coupled to multimodal systems conveying information about objects and events, which gradually led to the acquisition of modern speech. Gestural communication accompanies the development of vocal communication since very early in human evolution, and although both systems co-evolved tightly in the beginning, at some point speech became the main channel of communication.
Language	English
Publishing date	2018-03-27
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2411902-7
ISSN	1662-453X ; 1662-4548
ISSN (online)	1662-453X
ISSN	1662-4548
DOI	10.3389/fnins.2018.00174
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: A multimodal interface for speech perception: the role of the left superior temporal sulcus in social cognition and autism.

Kausel, Leonie / Michon, Maëva / Soto-Icaza, Patricia / Aboitiz, Francisco

Cerebral cortex (New York, N.Y. : 1991)

2024 Volume 34, Issue 13, Page(s) 84–93

Abstract: Multimodal integration is crucial for human interaction, in particular for social communication, which relies on integrating information from various sensory modalities. Recently a third visual pathway specialized in social perception was proposed, which ...

Abstract	Multimodal integration is crucial for human interaction, in particular for social communication, which relies on integrating information from various sensory modalities. Recently a third visual pathway specialized in social perception was proposed, which includes the right superior temporal sulcus (STS) playing a key role in processing socially relevant cues and high-level social perception. Importantly, it has also recently been proposed that the left STS contributes to audiovisual integration of speech processing. In this article, we propose that brain areas along the right STS that support multimodal integration for social perception and cognition can be considered homologs to those in the left, language-dominant hemisphere, sustaining multimodal integration of speech and semantic concepts fundamental for social communication. Emphasizing the significance of the left STS in multimodal integration and associated processes such as multimodal attention to socially relevant stimuli, we underscore its potential relevance in comprehending neurodevelopmental conditions characterized by challenges in social communication such as autism spectrum disorder (ASD). Further research into this left lateral processing stream holds the promise of enhancing our understanding of social communication in both typical development and ASD, which may lead to more effective interventions that could improve the quality of life for individuals with atypical neurodevelopment.
MeSH term(s)	Humans ; Temporal Lobe/physiology ; Temporal Lobe/physiopathology ; Social Cognition ; Speech Perception/physiology ; Social Perception ; Autistic Disorder/physiopathology ; Autistic Disorder/psychology ; Functional Laterality/physiology
Language	English
Publishing date	2024-05-02
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	1077450-6
ISSN	1460-2199 ; 1047-3211
ISSN (online)	1460-2199
ISSN	1047-3211
DOI	10.1093/cercor/bhae066
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Article: The Enigmatic Reissner's Fiber and the Origin of Chordates.

Aboitiz, Francisco / Montiel, Juan F

Frontiers in neuroanatomy

2021 Volume 15, Page(s) 703835

Abstract: Reissner's fiber (RF) is a secreted filament that floats in the neural canal of chordates. Since its discovery in 1860, there has been no agreement on its primary function, and its strong conservation across chordate species has remained a mystery for ... ...

Abstract	Reissner's fiber (RF) is a secreted filament that floats in the neural canal of chordates. Since its discovery in 1860, there has been no agreement on its primary function, and its strong conservation across chordate species has remained a mystery for comparative neuroanatomists. Several findings, including the chemical composition and the phylogenetic history of RF, clinical observations associating RF with the development of the neural canal, and more recent studies suggesting that RF is needed to develop a straight vertebral column, may shed light on the functions of this structure across chordates. In this article, we will briefly review the evidence mentioned above to suggest a role of RF in the origin of fundamental innovations of the chordate body plan, especially the elongation of the neural tube and maintenance of the body axis. We will also mention the relevance of RF for medical conditions like hydrocephalus, scoliosis of the vertebral spine and possibly regeneration of the spinal cord.
Language	English
Publishing date	2021-06-23
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2452969-2
ISSN	1662-5129
ISSN	1662-5129
DOI	10.3389/fnana.2021.703835
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Article: Faces and Voices Processing in Human and Primate Brains: Rhythmic and Multimodal Mechanisms Underlying the Evolution and Development of Speech.

Michon, Maëva / Zamorano-Abramson, José / Aboitiz, Francisco

Frontiers in psychology

2022 Volume 13, Page(s) 829083

Abstract: While influential works since the 1970s have widely assumed that imitation is an innate skill in both human and non-human primate neonates, recent empirical studies and meta-analyses have challenged this view, indicating other forms of reward-based ... ...

Abstract	While influential works since the 1970s have widely assumed that imitation is an innate skill in both human and non-human primate neonates, recent empirical studies and meta-analyses have challenged this view, indicating other forms of reward-based learning as relevant factors in the development of social behavior. The visual input translation into matching motor output that underlies imitation abilities instead seems to develop along with social interactions and sensorimotor experience during infancy and childhood. Recently, a new visual stream has been identified in both human and non-human primate brains, updating the dual visual stream model. This third pathway is thought to be specialized for dynamics aspects of social perceptions such as eye-gaze, facial expression and crucially for audio-visual integration of speech. Here, we review empirical studies addressing an understudied but crucial aspect of speech and communication, namely the processing of visual orofacial cues (i.e., the perception of a speaker's lips and tongue movements) and its integration with vocal auditory cues. Along this review, we offer new insights from our understanding of speech as the product of evolution and development of a rhythmic and multimodal organization of sensorimotor brain networks, supporting volitional motor control of the upper vocal tract and audio-visual voices-faces integration.
Language	English
Publishing date	2022-03-30
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2563826-9
ISSN	1664-1078
ISSN	1664-1078
DOI	10.3389/fpsyg.2022.829083
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Article ; Online: Neural responses to sensory novelty with and without conscious access.

Osorio, Sergio / Irani, Martín / Herrada, Javiera / Aboitiz, Francisco

NeuroImage

2022 Volume 262, Page(s) 119516

Abstract: Detection of novel stimuli that violate statistical regularities in the sensory scene is of paramount importance for the survival of biological organisms. Event-related potentials, phasic increases in pupil size, and evoked changes in oscillatory power ... ...

Abstract	Detection of novel stimuli that violate statistical regularities in the sensory scene is of paramount importance for the survival of biological organisms. Event-related potentials, phasic increases in pupil size, and evoked changes in oscillatory power have been proposed as markers of sensory novelty detection. However, how conscious access to novelty modulates these different brain responses is not well understood. Here, we studied the neural responses to sensory novelty in the auditory modality with and without conscious access. We identified individual thresholds for conscious auditory discrimination and presented to our participants sequences of tones, where the last stimulus could be another standard, a subthreshold target or a suprathreshold target. Participants were instructed to report whether the last tone of each sequence was the same or different from those preceding it. Results indicate that attentional orientation to behaviorally relevant stimuli and overt decision-making mechanisms, indexed by the P3 event-related response and reaction times, best predict whether a novel stimulus will be consciously accessed. Theta power and pupil size do not predict conscious access to novelty, but instead reflect information maintenance and unexpected sensory uncertainty. These results highlight the interplay between bottom-up and top-down mechanisms and how the brain weights neural responses to novelty and uncertainty during perception and goal-directed behavior.
MeSH term(s)	Acoustic Stimulation ; Attention/physiology ; Auditory Perception/physiology ; Consciousness/physiology ; Electroencephalography/methods ; Evoked Potentials/physiology ; Humans
Language	English
Publishing date	2022-08-02
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1147767-2
ISSN	1095-9572 ; 1053-8119
ISSN (online)	1095-9572
ISSN	1053-8119
DOI	10.1016/j.neuroimage.2022.119516
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Article ; Online: Morphological evolution of the vertebrate forebrain: From mechanical to cellular processes.

Aboitiz, Francisco / Montiel, Juan F

Evolution & development

2019 Volume 21, Issue 6, Page(s) 330–341

Abstract: Although the cerebral hemispheres are among the defining characters of vertebrates, each vertebrate class is characterized by a different anatomical organization of this structure, which has become highly problematic for comparative neurobiology. In this ...

Abstract	Although the cerebral hemispheres are among the defining characters of vertebrates, each vertebrate class is characterized by a different anatomical organization of this structure, which has become highly problematic for comparative neurobiology. In this article, we discuss some mechanisms involved in the generation of this morphological divergence, based on simple spatial constraints for neurogenesis and mechanical forces generated by increasing neuronal numbers during development, and the different cellular strategies used by each group to overcome these limitations. We expect this view to contribute to unify the diverging vertebrate brain morphologies into general, simple mechanisms that help to establish homologies across groups.
MeSH term(s)	Animals ; Biological Evolution ; Prosencephalon/anatomy & histology ; Prosencephalon/physiology ; Vertebrates/anatomy & histology ; Vertebrates/physiology
Language	English
Publishing date	2019-08-23
Publishing country	United States
Document type	Journal Article
ZDB-ID	2020288-X
ISSN	1525-142X ; 1520-541X
ISSN (online)	1525-142X
ISSN	1520-541X
DOI	10.1111/ede.12308
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Article ; Online: Homology in Amniote Brain Evolution: The Rise of Molecular Evidence.

Montiel, Juan F / Aboitiz, Francisco

Brain, behavior and evolution

2018 Volume 91, Issue 2, Page(s) 59–64

MeSH term(s)	Alligators and Crocodiles ; Animals ; Birds ; Neocortex
Language	English
Publishing date	2018-06-01
Publishing country	Switzerland
Document type	Journal Article ; Comment
ZDB-ID	1199-x
ISSN	1421-9743 ; 0006-8977
ISSN (online)	1421-9743
ISSN	0006-8977
DOI	10.1159/000489116
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Article: Multimodal imitative learning and synchrony in cetaceans: A model for speech and singing evolution.

Zamorano-Abramson, José / Michon, Maëva / Hernández-Lloreda, Ma Victoria / Aboitiz, Francisco

Frontiers in psychology

2023 Volume 14, Page(s) 1061381

Abstract: Multimodal imitation of actions, gestures and vocal production is a hallmark of the evolution of human communication, as both, vocal learning and visual-gestural imitation, were crucial factors that facilitated the evolution of speech and singing. ... ...

Abstract	Multimodal imitation of actions, gestures and vocal production is a hallmark of the evolution of human communication, as both, vocal learning and visual-gestural imitation, were crucial factors that facilitated the evolution of speech and singing. Comparative evidence has revealed that humans are an odd case in this respect, as the case for multimodal imitation is barely documented in non-human animals. While there is evidence of vocal learning in birds and in mammals like bats, elephants and marine mammals, evidence in both domains, vocal and gestural, exists for two Psittacine birds (budgerigars and grey parrots) and cetaceans only. Moreover, it draws attention to the apparent absence of vocal imitation (with just a few cases reported for vocal fold control in an orangutan and a gorilla and a prolonged development of vocal plasticity in marmosets) and even for imitation of intransitive actions (not object related) in monkeys and apes in the wild. Even after training, the evidence for productive or "true imitation" (copy of a novel behavior, i.e., not pre-existent in the observer's behavioral repertoire) in both domains is scarce. Here we review the evidence of multimodal imitation in cetaceans, one of the few living mammalian species that have been reported to display multimodal imitative learning besides humans, and their role in sociality, communication and group cultures. We propose that cetacean multimodal imitation was acquired in parallel with the evolution and development of behavioral synchrony and multimodal organization of sensorimotor information, supporting volitional motor control of their vocal system and audio-echoic-visual voices, body posture and movement integration.
Language	English
Publishing date	2023-04-11
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2563826-9
ISSN	1664-1078
ISSN	1664-1078
DOI	10.3389/fpsyg.2023.1061381
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Article ; Online: Gestures, vocalizations, and memory in language origins.

Aboitiz, Francisco

Frontiers in evolutionary neuroscience

2012 Volume 4, Page(s) 2

Abstract: THIS ARTICLE DISCUSSES THE POSSIBLE HOMOLOGIES BETWEEN THE HUMAN LANGUAGE NETWORKS AND COMPARABLE AUDITORY PROJECTION SYSTEMS IN THE MACAQUE BRAIN, IN AN ATTEMPT TO RECONCILE TWO EXISTING VIEWS ON LANGUAGE EVOLUTION: one that emphasizes hand control and ... ...

Abstract	THIS ARTICLE DISCUSSES THE POSSIBLE HOMOLOGIES BETWEEN THE HUMAN LANGUAGE NETWORKS AND COMPARABLE AUDITORY PROJECTION SYSTEMS IN THE MACAQUE BRAIN, IN AN ATTEMPT TO RECONCILE TWO EXISTING VIEWS ON LANGUAGE EVOLUTION: one that emphasizes hand control and gestures, and the other that emphasizes auditory-vocal mechanisms. The capacity for language is based on relatively well defined neural substrates whose rudiments have been traced in the non-human primate brain. At its core, this circuit constitutes an auditory-vocal sensorimotor circuit with two main components, a "ventral pathway" connecting anterior auditory regions with anterior ventrolateral prefrontal areas, and a "dorsal pathway" connecting auditory areas with parietal areas and with posterior ventrolateral prefrontal areas via the arcuate fasciculus and the superior longitudinal fasciculus. In humans, the dorsal circuit is especially important for phonological processing and phonological working memory, capacities that are critical for language acquisition and for complex syntax processing. In the macaque, the homolog of the dorsal circuit overlaps with an inferior parietal-premotor network for hand and gesture selection that is under voluntary control, while vocalizations are largely fixed and involuntary. The recruitment of the dorsal component for vocalization behavior in the human lineage, together with a direct cortical control of the subcortical vocalizing system, are proposed to represent a fundamental innovation in human evolution, generating an inflection point that permitted the explosion of vocal language and human communication. In this context, vocal communication and gesturing have a common history in primate communication.
Language	English
Publishing date	2012-02-01
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2505598-7
ISSN	1663-070X ; 1663-070X
ISSN (online)	1663-070X
ISSN	1663-070X
DOI	10.3389/fnevo.2012.00002
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Article ; Online: Genetic and developmental homology in amniote brains. Toward conciliating radical views of brain evolution.

Aboitiz, Francisco

Brain research bulletin

2011 Volume 84, Issue 2, Page(s) 125–136

Abstract: The six-layered neocortex is both a unique and a universal character of mammals. Historically, a major concern has been to determine its phylogenetic origins by establishing which structures, if any, correspond to it in the brains of other vertebrates. ... ...

Abstract	The six-layered neocortex is both a unique and a universal character of mammals. Historically, a major concern has been to determine its phylogenetic origins by establishing which structures, if any, correspond to it in the brains of other vertebrates. Two opposing hypotheses have been debated in the last years: (i) the neocortex arises entirely from the dorsal hemisphere of ancestral reptiles, and (ii) a large portion of it originates in the lateral hemisphere, from a structure termed the dorsal ventricular ridge (DVR), which expands significantly in reptiles and especially in birds. While developmental and genetic evidence strongly favors a dorsal origin of the neocortex, there are important similarities in the sensory connectivity to the neocortex and to the DVR, and more recently, in the phenotype of late-produced elements in both structures. It is proposed that, despite originating in different embryonic domains, the proliferative expansion of both the mammalian neocortex and the sauropsidian DVR is partly based on the amplification of similar developmental programs, possibly dependent on Pax6 activity or of related cascades that promote progenitor proliferation. While Pax6 activity is already present in the amphibian pallium, I propose that at some point(s) in amniote evolution it has been upregulated yielding brain expansion in both sauropsids and mammals. However, in the latter there has been an additional dorsalizing influence contributing to the development of the neocortex and restricting the expansion of the lateral hemisphere. Finally, a significant contribution to neocortical origins by anterior signaling centers secreting FGFs is suggested, by virtue of their association to olfactory development and their cortical patterning functions. This perspective fits a dynamical view of brain homology, where instead of searching for a one-to-one correspondence between components, emphasis is placed on changes in the modulation of conserved signaling centers and their corresponding morphogen gradients across species.
MeSH term(s)	Animals ; Biological Evolution ; Birds/anatomy & histology ; Birds/physiology ; Brain/anatomy & histology ; Brain/physiology ; Eye Proteins/metabolism ; Homeodomain Proteins/metabolism ; Mammals ; Morphogenesis ; Neocortex/anatomy & histology ; Neocortex/physiology ; Neurogenesis ; Neurons/cytology ; Neurons/physiology ; PAX6 Transcription Factor ; Paired Box Transcription Factors/metabolism ; Repressor Proteins/metabolism ; Reptiles/anatomy & histology ; Reptiles/physiology
Chemical Substances	Eye Proteins ; Homeodomain Proteins ; PAX6 Transcription Factor ; Paired Box Transcription Factors ; Repressor Proteins
Language	English
Publishing date	2011-02-01
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	197620-5
ISSN	1873-2747 ; 0361-9230
ISSN (online)	1873-2747
ISSN	0361-9230
DOI	10.1016/j.brainresbull.2010.12.003
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