unipolar neuronemedical dictionary

A neurone whose cell body emits a single axonal process resulting from the fusion of two polar processes during development; at a variable distance from the cell body, the process divides into a peripheral axon branch extending outward as a peripheral afferent (sensory) nerve fibre, and a central axon branch that enters into synaptic contact with neurone's in the spinal cord or brainstem. With the single known exception of the neurone's composing the mesencephalic nucleus of the trigeminus, unipolar neurone's are the exclusive neural elements of the sensory ganglia. The lack of dendritic processes of these primary sensory neurone's is only apparent: the dendritic pole of the unipolar neurone is represented by the unmyelinated terminal ramifications of the peripheral axon branch.

Synonyms: pseudounipolar cell, pseudounipolar neurone, unipolar cell.

American spelling: unipolar neuron

(05 Mar 2000)

unipolar cell, unipolar electrocardiogram, unipolar leads < Prev | Next > uniport, uniporter, unipotent

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