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Biomedical subjects

M A Corner

Publications and source records attributed to M A Corner.

At least 55 records · Page 3Linked to original sources
PubMed1976

Cyclic EEG and motility patterns during sleep in restrained infant rats.

When restrained in a quasi-fetal position, infant rats (2--3 weeks old) remain for an extended period in a sleep-like state as judged by polygraphic criteria. Moreover, they become very difficult to arouse by sensory stimuli, and show a level of spontaneous motility considerably higher than is normally found at this age during sleep. Phasic generalized body movements, which are often quite stereotyped, occur in trains at regular intervals, against a low background level of neck muscle tonus. The amplitude of the cortical EEG, especially in the delta band, is negatively correlated with the frequency of spontaneous motor burst activity. It is suggested that these REM-like "rapid body movements" in immature mammals may well represent a transitional stage between fetal behavior patterns and sleep motility in the adult organism.

Age Factors↗
PubMedDate not supplied

Cutaneous receptive field enlargement following skin-grafting in the frog, D. pictus.

Misdirected wiping responses occur in Discoglossus pictus frogs when skin-grafted early in larval life. Cutaneous receptive fields (CRF) for various peripheral nerve branches were mapped electrophysiologically in control and skin-grafted frogs. The ventrolateral nerve branch (VL) frequently provided innervation for significant areas of dorsal skin in both control and skin-grafted animals. Although the VL crossed over onto dorsal skin areas in some skin-grafted frogs giving rise to misdirected reflexes, these dorsal extensions frequently failed to include all skin areas from which the maladaptive reflexes could be elicited. It was concluded that misdirected reflexes are mediated via dorsal nerve branches occupying normal mid-dorsal areas of the back.

Abdomen↗