Textbook of Clinical Neuroanatomy by Singh Vishram

Author:Singh, Vishram [Singh, Vishram]
Language: eng
Format: epub
ISBN: 978-81-312-2981-1
Publisher: Elsevier Health Sciences APAC
Published: 2010-10-12T16:00:00+00:00

White matter

The lateral surface of the thalamus is covered by a thin layer of white matter called external medullary lamina and its superior surface by a similar layer of white matter called stratum zonale.

A vertical Y-shaped sheet of white matter within the thalamus is called internal medullary lamina.

Grey matter

The thalamic grey matter consists of number of nuclei (Fig. 11.3).

The grey matter of the thalamus is traversed anteropos-teriorly by a vertical sheet of white fibres, the internal medullary lamina which bifurcates anteriorly to assume a Y-shaped configuration. This Y-shaped internal medullary lamina divides the thalamus into three main parts: anterior, medial, and lateral.

The anterior part includes the anterior tubercle and lies between the ‘limbs’ of the Y, the medial and lateral parts lie on either side of the ‘stem’ of the Y. Each of these parts consists of number of nuclei.

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