Limiting parental feedback disrupts vocal development in marmoset monkeys

Gultekin, Yasemin B.; Hage, Steffen R.

doi:10.1038/ncomms14046

Cited by 95 publications

(114 citation statements)

References 65 publications

(111 reference statements)

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“…They can also convey identity through aspects of their calls [65]. Their calls change from infancy into adulthood, much like in humans, and limiting parent feedback disrupts this development [66]. Several Old World monkeys display relevant vocal learning abilities.…”

Section: Box 3 Evidence Of Vocal Learning Abilities In Species Outsimentioning

confidence: 99%

“…Taking all the evidence available into account, and placing the focus in the behavior observed, we believe a more accurate "vocal learners list" (albeit with some tentative cases) would be the one we sketch in Fig 1. We can see in this new list that it is possible to reduce the gap between us and the other vocal learners in a principled way. Although a direct forebrain-larynx connection is maybe not shared, there is much that is shared: similar patterns of early postnatal vocal development [66], volition [24], both voiceless and even voiced calls [42], socially reinforced vocal production, etc.…”

Section: Tree Of Vocal Learners With a Focus On Behaviormentioning

confidence: 99%

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Vocal learning: Beyond the continuum

Martins¹,

Boeckx²

2020

PLoS Biol

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Vocal learning is the ability to modify vocal output on the basis of experience. Traditionally, species have been classified as either displaying or lacking this ability. A recent proposal, the vocal learning continuum, recognizes the need to have a more nuanced view of this phenotype and abandon the yes-no dichotomy. However, it also limits vocal learning to production of novel calls through imitation, moreover subserved by a forebrain-to-phonatorymuscles circuit. We discuss its limitations regarding the characterization of vocal learning across species and argue for a more permissive view.

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Section: Box 3 Evidence Of Vocal Learning Abilities In Species Outsimentioning

confidence: 99%

Section: Tree Of Vocal Learners With a Focus On Behaviormentioning

confidence: 99%

Vocal learning: Beyond the continuum

Martins¹,

Boeckx²

2020

PLoS Biol

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“…Recently, this perception has dramatically changed. Current studies have revealed distinct learning mechanisms during vocal development [6][7][8] and vocal flexibility, allowing monkeys to cognitively control when [9,10], where [11], and what to vocalize [10,12,13]. However, specific call features (e.g., duration, frequency) remain surprisingly robust and stable in adult monkeys, resulting in rather stereotyped and discrete call patterns [14].…”

Section: In Briefmentioning

confidence: 99%

“…The spectrograms were calculated using a 1024-point FFT window, Hanning window (512 samples), and 125-sample overlap. We classified marmoset vocalizations into groups using previous definitions [8,14,19,38]. Calls were manually classified as phee, twitter, tsik, and ekk calls based on their spectro-temporal profile and auditory playback.…”

Section: Acoustic Analysismentioning

confidence: 99%

Precise Motor Control Enables Rapid Flexibility in Vocal Behavior of Marmoset Monkeys

et al. 2018

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Investigating the evolution of human speech is difficult and controversial because human speech surpasses nonhuman primate vocal communication in scope and flexibility [1-3]. Monkey vocalizations have been assumed to be largely innate, highly affective, and stereotyped for over 50 years [4, 5]. Recently, this perception has dramatically changed. Current studies have revealed distinct learning mechanisms during vocal development [6-8] and vocal flexibility, allowing monkeys to cognitively control when [9, 10], where [11], and what to vocalize [10, 12, 13]. However, specific call features (e.g., duration, frequency) remain surprisingly robust and stable in adult monkeys, resulting in rather stereotyped and discrete call patterns [14]. Additionally, monkeys seem to be unable to modulate their acoustic call structure under reinforced conditions beyond natural constraints [15, 16]. Behavioral experiments have shown that monkeys can stop sequences of calls immediately after acoustic perturbation but cannot interrupt ongoing vocalizations, suggesting that calls consist of single impartible pulses [17, 18]. Using acoustic perturbation triggered by the vocal behavior itself and quantitative measures of resulting vocal adjustments, we show that marmoset monkeys are capable of producing calls with durations beyond the natural boundaries of their repertoire by interrupting ongoing vocalizations rapidly after perturbation onset. Our results indicate that marmosets are capable of interrupting vocalizations only at periodic time points throughout calls, further supported by the occurrence of periodically segmented phees. These ideas overturn decades-old concepts on primate vocal pattern generation, indicating that vocalizations do not consist of one discrete call pattern but are built of many sequentially uttered units, like human speech.

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“…The range of vocalizations is well-conserved in monkeys raised in captive colonies bred for research purposes and can be evaluated without complex elicitation protocols [e.g., 28, 29, 30, 31, 32]. Vocalizations develop in common marmosets with modeling from parental feedback [33, 34], and call acoustic parameters develop differently based on call type [31]. Most published evaluations of marmoset vocalization development are performed using specialized audio recording equipment, and call analysis requires specific training.…”

Section: Introductionmentioning

confidence: 99%

Vocalization development in common marmosets for neurodegenerative translational modeling

Jones

Duffy

Hoffman

et al. 2018

Neurological Research

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Objectives In order to facilitate the study of vocalizations in emerging genetic common marmoset models of neurodegenerative disorders, we aimed to analyze call type changes across age in a translational research environment. We hypothesized that acoustic parameters of vocalizations would change with age, reflecting growth of the vocal apparatus and a maturation of control needed to make adult-like calls. Methods Nineteen developing common marmosets were longitudinally video- and audio-recorded between the ages of 1–149 days in a naturalistic setting without any vocalization elicitation protocol. Vocalizations were coded for call type (cry, tsik, trill, phee, and trill-phee) and analyzed for duration (sec), minimum & maximum frequency (Hz), and bandwidth (Hz). Mixed model linear regressions were performed to assess the effects of age on call parameters listed above for each call type. Results Cries decreased in duration (p=0.038), maximum frequency (p=0.047), and bandwidth (p=0.023) with age. Tsik calls decreased in duration (p=0.002) and increased in minimum frequency (p=0.004) and maximum frequency (p=0.005) with age. Trill calls increased in duration (p=0.003), and trillphee bandwidth (p=0.031) decreased with age. Discussion Our results demonstrate that development of common marmoset vocalizations is call type-dependent and that changes in acoustic parameters can be detected without complex vocalization elicitation paradigms or specialized audio recording equipment. Thus, we demonstrate the feasibility of a naturalistic protocol to collect and objectively analyze marmoset vocalizations longitudinally. This approach may be useful for studying vocal communication deficits in genetic models of neurodegenerative disorders.

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Limiting parental feedback disrupts vocal development in marmoset monkeys

Cited by 95 publications

References 65 publications

Vocal learning: Beyond the continuum

Vocal learning: Beyond the continuum

Precise Motor Control Enables Rapid Flexibility in Vocal Behavior of Marmoset Monkeys

Vocalization development in common marmosets for neurodegenerative translational modeling

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