| 释义 |
middle frontal sulcus mid·dle fron·tal sul·cusa 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 |