nucleus that lies immediately medial (and deep) to the uncus

Discussion in 'USMLE STEP 1' started by R.dass, Jan 26, 2008.

  1. R.dass

    R.dass Guest

    Q. The nucleus that lies immediately medial (and deep) to the uncus is the

    A. amygdala
    B. caudate nucleus
    C. claustrum
    D. hippocampus
    E. putamen
    F. thalamus
  2. R.dass

    R.dass Guest

    The correct answer is A.

    The uncus, which is the medial protrusion of the parahippocampal gyrus, is an external structure seen on the ventral surface of the temporal lobe. The amygdala is a collection of nuclei that lies directly beneath the uncus.

    The caudate nucleus (choice B) is a deep nuclear structure that lies lateral to the lateral ventricles.

    The claustrum (choice C) is a thin and elongated nucleus that lies just medial to the insular cortex.

    The hippocampus (choice D) is a nuclear structure that lies in the interior of the parahippocampal gyrus.

    The putamen (choice E) is a nuclear structure that resides lateral to the caudate, and medial to the claustrum.

    The thalamus (choice F) is a deep nuclear structure, caudal to the caudate nucleus.

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