Epicranial aponeurosis

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Epicranial aponeurosis
Muscles of the head, face, and neck. (Epicranial aponeurosis visible at top.)
Latin Galea aponeurotica,
Aponeurosis epicranialis,
Aponeurosis epicrania
TA A04.1.03.007
FMA 46768
Anatomical terminology

The epicranial aponeurosis (aponeurosis epicranialis, galea aponeurotica) is an aponeurosis (a tough layer of dense fibrous tissue) which covers the upper part of the cranium in humans and various other animals. In humans, it is attached, in the interval between its union with the occipitofrontalis muscle, to the external occipital protuberance and highest nuchal lines of the occipital bone; in front, it forms a short and narrow prolongation between its union with the frontalis muscle or frontal part of the occipitofrontalis muscle.

On either side it gives origin to the anterior and the superior auricular muscles; in this situation it loses its aponeurotic character, and is continued over the temporal fascia to the zygomatic arch as a layer of laminated areolar tissue.

It is closely connected to the integument by the firm, dense, fibro-fatty layer which forms the superficial fascia of the scalp: it is attached to the pericranium by loose cellular tissue, which allows the aponeurosis, carrying with it the integument, to move through a considerable distance.

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This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

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