3) There was an approximately two times enlargement of the representation of the fingers recorded in cortical area 1 in postlesion monkeys. 
Focal injections of horseradish peroxidase (HRP), wheatgerm agglutinin conjugated to HRP, or [ 3H]proline were made into somatosensory cortical area 1 (S1).
No significant effect on resting membrane potential, input resistance, or action potential size in cortical area 1 (CA1) pyramidal cells was observed with morphine sulfate, beta-endorphin, [ Met5]enkephalin, or [ D-Ala2, D-Leu5]enkephalin at 1-50 microM.
The projections of visual cortical area 1 (vl) to the thalamus, pretectum and superior colliculus of the rabbit have been studied by Giolli and Guthrie ('67, '71) using the Nauta and Fink-Heimer methods to determine the course and distribution of degenerating nerve fibers.
Horseradish peroxidase (HRP) has been injected in visual cortical area 1 (V1, striate cortex) of 33 rabbits (16 received a unilateral injection, 17 bilateral injections) in order to identify its thalamic inputs and to determine their retinotopic organization.
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