{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T21:22:23Z","timestamp":1770758543331,"version":"3.50.0"},"reference-count":0,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[1975,10,1]],"date-time":"1975-10-01T00:00:00Z","timestamp":181353600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The Journal of Physiology"],"published-print":{"date-parts":[[1975,10]]},"abstract":"<jats:p>1. The experiments were designed to investigate the effects of longitudinal muscle displacements on neurones of the motor cortex of anaesthetized Cebus monkeys and thus test the hypothesis that signals from muscle spindles may modify motor cortical output. The effects of sinusoidal stretching of the extensor digitorum communis (EDC) at frequencies varying from 6 to 300 Hz and of step and rhomboidal stretches were studied in neurones of the motor cortex. For comparison, neurones of the primary receiving area for low\u2010threshold muscle afferents, cortical area 3a, were also included in this study. Neurones of the motor cortex were subdivided into corticospinal (PT) neurones and non\u2010corticospinal (non\u2010PT) neurones. 2. Threshold stretch amplitudes were clearly higher for neurones of area 4 (PT and non\u2010PT) than for 3a neurones. However, a conspicuous fall in threshold stretch amplitude was observed for all three neurone populations when the frequency of sinusoidal stretching was increased (highest frequency: 300 Hz). A small number of non\u2010PT and PT neurones responded to vibration amplitudes of less than 100 mum and some of these low\u2010threshold cells of area 4 also responded to rhomboidal stretches of 8 mm\/sec ramp velocity and 80 mum plateau amplitude. Increasing the stretch amplitude to twice threshold nearly doubled the output magnitude in all three cell types. Neurones of area 3a and non\u2010PT neurones of area 4 had similar latencies, and these were significantly shorter than the latencies of PT neurones tested with trains of high frequency vibration. Dynamic response patterns were observed in all three cell types, but most frequently in 3a neurones. 3. It is concluded that, in Cebus monkeys, signals from both primary and secondary muscle spindle endings from forelimb muscles reach the motor cortex. Under the present experimental conditions, the input from the primaries to the motor cortex was effective only if these spindle receptors were driven maximally by vibratory stimuli. The particularly low probability of stretch\u2010evoked discharges of cortico\u2010spinal neurones in the anaesthetized preparation may be explained by a low gain in transmission from input to output cells of the motor cortex.<\/jats:p>","DOI":"10.1113\/jphysiol.1975.sp011125","type":"journal-article","created":{"date-parts":[[2014,12,19]],"date-time":"2014-12-19T09:28:34Z","timestamp":1418981314000},"page":"833-853","source":"Crossref","is-referenced-by-count":112,"title":["Responses of neurones in motor cortex and in area 3A to controlled stretches of forelimb muscles in cebus monkeys."],"prefix":"10.1113","volume":"251","author":[{"given":"G E","family":"Lucier","sequence":"first","affiliation":[]},{"given":"D C","family":"R\u00fcegg","sequence":"additional","affiliation":[]},{"given":"M","family":"Wiesendanger","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[1975,10]]},"container-title":["The Journal of Physiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1113%2Fjphysiol.1975.sp011125","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/physoc.onlinelibrary.wiley.com\/doi\/pdf\/10.1113\/jphysiol.1975.sp011125","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,11,5]],"date-time":"2023-11-05T04:10:41Z","timestamp":1699157441000},"score":1,"resource":{"primary":{"URL":"https:\/\/physoc.onlinelibrary.wiley.com\/doi\/10.1113\/jphysiol.1975.sp011125"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1975,10]]},"references-count":0,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1975,10]]}},"alternative-id":["10.1113\/jphysiol.1975.sp011125"],"URL":"https:\/\/doi.org\/10.1113\/jphysiol.1975.sp011125","archive":["Portico"],"relation":{},"ISSN":["0022-3751","1469-7793"],"issn-type":[{"value":"0022-3751","type":"print"},{"value":"1469-7793","type":"electronic"}],"subject":[],"published":{"date-parts":[[1975,10]]}}}