middle frontal sulcus(redirected from sulcus frontalis medius)
mid·dle fron·tal sul·cus
a relatively shallow sagittal fissure of the brain dividing the middle frontal convolution into an upper and lower part; this sulcus is found only in humans and anthropoid apes; at its anterior extremity it bifurcates, the two branches spreading out laterally and constituting the frontomarginal sulcus.
Synonym(s): sulcus frontalis medius
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