Tegmentum

Last revised by Dr Tristan Skalina on 14 Nov 2021

The tegmentum is one of the areas of the brainstem. It is a phylogenetically old part of the brainstem and, in adults, is the location of the brainstem nuclei 1

In the midbrain, it sits between the quadrigeminal plate and cerebral peduncles and includes oculomotor (CN III) and trochlear (CN IV) nerve nuclei 1. In the pons, it is posterior to the basilar part of the pons and, in the medulla is adjacent to the pyramids.

History and etymology

Tegmentum originates from the Latin for covering.

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Cases and figures

  • Figure 1: midbrain image showing tectum and tegmentum
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  • Figure 2: brainstem motor nuclei
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  • Figure 3: brainstem sensory nuclei
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  • Figure 4: brainstem nuclei - dorsal section
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