Corpus: Styloglossus muscle
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from ancient Greek: stylos - column, stylus
1. Definition
The styloglossus muscle is a narrow skeletal muscle that is one of the external tongue muscles.
2. Course
2.1. Origin
The styloglossus muscle originates on the anterior and lateral side of the styloid process of the temporal bone (os temporale) and on the stylomandibular ligament.
2.2. Attachment
The fibres of the styloglossus muscle run between the internal carotid artery and the external carotid artery in a rostral and caudal direction. They divide into 2 cords on the side of the tongue - near the back of the tongue. One part runs straight into the body of the tongue and mixes there with the fibres of the inferior longitudinal muscle. The other part runs transversely downwards and overlaps the hyoglossus muscle, with whose fibres it mixes.
3. Innervation
The styloglossus muscle receives its motor supply from the hypoglossal nerve (nerve XII).
4. Function
The styloglossus muscle pulls the tongue backwards and upwards. It supports the act of swallowing.