Galea aponeurotica

Last revised by Travis Fahrenhorst-Jones on 30 Aug 2021

The galea aponeurotica (also called the galeal or epicranial aponeurosis or the aponeurosis epicranialis) is a tough fibrous sheet of connective tissue that extends over the cranium, forming the middle (third) layer of the scalp

The galea aponeurotica also contains vessels that communicate between the deep vascular plexus contained within the subgaleal layer below as well as the superficial vascular plexus in the subcutaneous layer above 2

Collections of the scalp that sit deep to the galea aponeurotica in the subgaleal space have the potential to drain anteriorly from the scalp into the eyelids 2. This is seen in cases of periorbital hematoma following scalp trauma or surgery in which blood passes anteriorly deep to the galea aponeurotica. 

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Cases and figures

  • Figure 1: galea aponeurosis
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  • Figure 2: layers of the skull
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  • Figure 3: scalp layers
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