MOTOR EFFECTS OF STIMULATION OF CEREBRAL CORTEX OF SQUIRREL MONKEY (<i>SAIMIRI SCIUREUS</i>)

Welker, Wally; Benjamin, Robert M.; Miles, Raymond C.; Woolsey, Clinton N.

doi:10.1152/jn.1957.20.4.347

Cited by 98 publications

(26 citation statements)

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“…Specifically, in Japanese macaques (Macaca fuscata), many neurons of the supplementary motor area (SMA) project to the orofacial region of primary motor cortex [27], while relatively few neurons in the SMA of owl monkeys (Aotus trivirgatus) make these projections [28]. Moreover, compared with the broad region of SMA that can evoke orofacial movements in macaques [29], electrical surface stimulation of the SMA in squirrel monkeys does not evoke orofacial movements [30]. Similarly, intracortical microstimulation of only a small region of SMA in owl monkeys evokes orofacial movement [31].…”

Section: Discussionmentioning

confidence: 99%

Correlated evolution of brain regions involved in producing and processing facial expressions in anthropoid primates

Dobson

Sherwood

2010

Biol. Lett.

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Anthropoid primates are distinguished from other mammals by having relatively large primary visual cortices (V1) and complex facial expressions. We present a comparative test of the hypothesis that facial expression processing coevolved with the expansion of V1 in anthropoids. Previously published data were analysed using phylogenetic comparative methods. The results of our study suggest a pattern of correlated evolution linking social group size, facial motor control and cortical visual processing in catarrhines, but not platyrrhines. Catarrhines that live in relatively large social groups tended to have relatively large facial motor nuclei, and relatively large primary visual cortices. We conclude that catarrhine brains are adapted for producing and processing complex facial displays.

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Section: Discussionmentioning

confidence: 99%

Correlated evolution of brain regions involved in producing and processing facial expressions in anthropoid primates

Dobson

Sherwood

2010

Biol. Lett.

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“…In general, electrically evoked motor responses in S1 resemble those evoked in M1, with the exception that stimulation thresholds are greater (Welker et al, 1957;Woolsey, 1958;Doetsch and Gardner, 1972;Sessle and Weisendanger, 1982). In both the results presented here and results reported in electrical stimulation studies of cortex in Didelphis (Lende, 1963c;Beck et al, 1996), movements were most often evoked by using relatively high threshold stimulation; higher than the Ͻ 20 A typically observed in microstimulation studies of M1 of primates (Sessle and Weisendanger, 1982;Stepniewska et al, 1993;Nudo et al, 1992Nudo et al, , 1996.…”

Section: Motor Representationmentioning

confidence: 96%

Somatosensory and motor representations in cerebral cortex of a primitive mammal (Monodelphis domestica): A window into the early evolution of sensorimotor cortex

et al. 2000

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“…In their study on the distribution of corticocortical neurons projecting to the orofacial region of the MI, they have observed that only a few or no neurons are labeled in the SMA in three cases examined after injection of a retrograde tracer into the orofacial region of the MI. With respect to New World monkeys, Welker et al (1957) have reported that, by using electrical surface stimulation, no orofacial representation is found in the SMA of the squirrel monkey. By using ICMS, Gould et al (1986) reported that, in the SMA of the owl monkey, there may exist only a small area representing the orofacial part.…”

Section: Smamentioning

confidence: 99%

Reevaluation of ipsilateral corticocortical inputs to the orofacial region of the primary motor cortex in the macaque monkey

et al. 1997

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An anatomical approach to possible areas in the cerebral cortex involved in somatic motor behavior is to analyze the cortical areas containing neurons that connect directly to the primary motor cortex (MI). To define the cortical areas related to orofacial movements, we examined the distribution of cortical neurons that send their axons to the orofacial region of the MI in the macaque monkey. Injections of retrograde tracers into the electrophysiologically identified orofacial region of the MI revealed that labeled neurons were distributed in the following cortical areas: the orbital cortex (area 12), insular cortex, frontoparietal operculum (including the deep part of the cortical masticatory area and the secondary somatosensory cortex), ventral division of the premotor cortex (especially in its lateral part), orofacial region of the supplementary motor area, rostral division of the cingulate motor area (CMA), and CMA on the ventral bank. A number of labeled neurons were also seen in the MI around the injection sites and in the parietal cortex (including the primary somatosensory cortex and area 7b). No labeled neurons were found in the dorsal division of the premotor cortex. Fluorescent retrograde double labeling further revealed virtually no overlap of distribution between cortical neurons projecting to the orofacial and forelimb regions of the MI. Based on the present results, we discuss the functional diversity of the cortical areas related to orofacial motor behavior and the somatotopical organization in the premotor areas of the frontal cortex.

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MOTOR EFFECTS OF STIMULATION OF CEREBRAL CORTEX OF SQUIRREL MONKEY (SAIMIRI SCIUREUS)

Cited by 98 publications

References 0 publications

Correlated evolution of brain regions involved in producing and processing facial expressions in anthropoid primates

Correlated evolution of brain regions involved in producing and processing facial expressions in anthropoid primates

Somatosensory and motor representations in cerebral cortex of a primitive mammal (Monodelphis domestica): A window into the early evolution of sensorimotor cortex

Reevaluation of ipsilateral corticocortical inputs to the orofacial region of the primary motor cortex in the macaque monkey

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