Central pattern generators for social vocalization: Androgen-dependent neurophysiological mechanisms

Bass, Andrew H.; Remage‐Healey, Luke

doi:10.1016/j.yhbeh.2007.12.010

Cited by 75 publications

(62 citation statements)

References 119 publications

(178 reference statements)

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“…Midshipman fish have been extensively studied as a model system for the neural and hormonal mechanisms underlying vocal-acoustic communication [e.g., Bass and Remage-Healey, 2008;Forlano et al, 2014;Bass et al, 2015;Feng and Bass, 2017]. Here, we report robust mRNA label in the forebrain and midbrain, with more limited expression in the hindbrain (Table 1).…”

Section: Discussionmentioning

confidence: 63%

FoxP2 Expression in a Highly Vocal Teleost Fish with Comparisons to Tetrapods

Pengra

Marchaterre

Bass³

2018

Brain Behav Evol

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Motivated by studies of speech deficits in humans, several studies over the past two decades have investigated the potential role of a forkhead domain transcription factor, FoxP2, in the central control of acoustic signaling/vocalization among vertebrates. Comparative neuroanatomical studies that mainly include mammalian and avian species have mapped the distribution of FoxP2 expression in multiple brain regions that imply a greater functional significance beyond vocalization that might be shared broadly across vertebrate lineages. To date, reports for teleost fish have been limited in number and scope to nonvocal species. Here, we map the neuroanatomical distribution of FoxP2 mRNA expression in a highly vocal teleost, the plainfin midshipman (Porichthys notatus). We report an extensive overlap between FoxP2 expression and vocal, auditory, and steroid-signaling systems with robust expression at multiple sites in the telencephalon, the preoptic area, the diencephalon, and the midbrain. Label was far more restricted in the hindbrain though robust in one region of the reticular formation. A comparison with other teleosts and tetrapods suggests an evolutionarily conserved FoxP2 phenotype important to vocal-acoustic and, more broadly, sensorimotor function among vertebrates.

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Section: Discussionmentioning

confidence: 63%

FoxP2 Expression in a Highly Vocal Teleost Fish with Comparisons to Tetrapods

Pengra

Marchaterre

Bass³

2018

Brain Behav Evol

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“…Arnold et al, 1976;Ball et al, 2004;Brenowitz, 2004) and midshipman fish (Forlano and Bass, 2005a;Forlano and Bass, 2005b;Bass and Forlano, 2008). As in songbirds, plasma levels of steroid hormones cycle with reproductive state in midshipman, while androgen and estrogen receptors are found in the midshipman's vocal control system in conjunction with the expression of brain aromatase, which converts testosterone to estradiol (reviewed by Bass and Remage-Healey, 2008;Forlano et al, 2006).…”

Section: Steroid-and Melatonin-dependent Rhythmicitymentioning

confidence: 99%

Reproductive and diurnal rhythms regulate vocal motor plasticity in a teleost fish

Rubow

Bass

2009

Journal of Experimental Biology

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SUMMARYSeasonal and circadian rhythms control fundamental physiological processes including neural excitability and synaptic plasticity that can lead to the periodic modulation of motor behaviors like social vocalizations. Parental male midshipman fish produce three call types during the breeding season: long duration (min to >1 h) advertisement 'hums', frequency and amplitude modulated agonistic 'growls' (s), and very brief (ms) agonistic 'grunts' produced either singly or repetitively as 'grunt trains' for up to several minutes. Fictive grunts that establish the temporal properties of natural grunts are readily evoked and recorded in vivo from vocal occipital nerve roots at any time of day or year by electrical microstimulation in either the midbrain periaqueductal gray or a hindbrain vocal pre-pacemaker nucleus. Now, as shown here, the longer duration fictive growls and hums can also be elicited, but are restricted to the nocturnal reproductive season. A significant drop in call threshold accompanies the fictive growls and hums that are distinguished by their much longer duration and lower and more regular firing frequency. Lastly, the long duration fictive calls are dependent upon increased stimulation time and intensity and hence may result from activitydependent changes in the vocal motor circuit that are themselves modulated by seasonal and circadian rhythms.

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“…Conserved features of vertebrate vocal-acoustic communication include the production of context-dependent vocal call types, occurrence over predictable daily and seasonal cycles, and the ability of neuro-hormones to modulate vocal motor output by acting upon dedicated neural networks (Bass and Remage-Healey, 2008;Goodson and Bass, 2001;Tramontin and Brenowitz, 2000). Most studies to date on fish circadian rhythms have investigated the effects of photoperiod and the time-keeping pineal hormone, melatonin, on locomotor or feeding activity, while little attention has been paid to melatonin's action on courtship behaviors such as vocalization, or more generally on underlying neural circuitry (Azpeleta et al, 2010;López-Olmeda et al, 2006;Piccinetti et al, 2010;Pinillos et al, 2001;Zhdanova et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Melatonin action in a midbrain vocal-acoustic network

Feng

Bass

2013

Journal of Experimental Biology

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Melatonin is a well-documented time-keeping hormone that can entrain an individual's physiology and behavior to the day-night cycle, though surprisingly little is known about its influence on the neural basis of social behavior, including vocalization. Male midshipman fish (Porichthys notatus) produce several call types distinguishable by duration and by daily and seasonal cycles in their production. We investigated melatonin's influence on the known nocturnal-and breeding season-dependent increase in excitability of the midshipman's vocal network (VN) that directly patterns natural calls. VN output is readily recorded from the vocal nerve as a 'fictive call'. Five days of constant light significantly increased stimulus threshold levels for calls electrically evoked from vocally active sites in the medial midbrain, supporting previous findings that light suppresses VN excitability, while 2-iodomelatonin (2-IMel; a melatonin analog) implantation decreased threshold. 2-IMel also increased fictive call duration evoked from medial sites as well as lateral midbrain sites that produced several-fold longer calls irrespective of photoregime or drug treatment. When stimulus intensity was incrementally increased, 2-IMel increased duration only at lateral sites, suggesting that melatonin action is stronger in the lateral midbrain. For animals receiving 5 days of constant darkness, known to increase VN excitability, systemic injections of either of two mammalian melatonin receptor antagonists increased threshold and decreased duration for calls evoked from medial sites. Our results demonstrate melatonin modulation of VN excitability and suggest that social contextdependent call types differing in duration may be determined by neuro-hormonal action within specific regions of a midbrain vocalacoustic network.

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Central pattern generators for social vocalization: Androgen-dependent neurophysiological mechanisms

Cited by 75 publications

References 119 publications

FoxP2 Expression in a Highly Vocal Teleost Fish with Comparisons to Tetrapods

FoxP2 Expression in a Highly Vocal Teleost Fish with Comparisons to Tetrapods

Reproductive and diurnal rhythms regulate vocal motor plasticity in a teleost fish

Melatonin action in a midbrain vocal-acoustic network

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