Unit 4 - Extrinsic Muscles of the tongue

Genioglossus
- Origin: Posterior midline of mandible
- Insertion: body of the tongue from root to tip and side to side
- Action: depends on where the tongue is as it contracts (tongue out - pulls it in, tongue is up - pull it down toward midline of mandible)
Styloglossus
- Origin: styloid process of the temporal bone
- Insertion: inferior longitudinal and hyglossus
- Action: draws tongue up and back
Hypoglossus
- Origin: upper surface of the hyoid
- Insertion: posterior half of tongue and continuous with glossopalatine
- Action: retract and lower tongue
Glossopalatine
- Origin can pull insertion and vice versa
- forms the anterior faucial pillar an archway in the back of mouth that separates oral and pharyngeal cavities
- Origin: Anterior surface of soft palate
- Insertion: side of the tongue blending with styloglossus and hyoglossus
- Action: raise back of tongue or lower the soft palate

Author

jadnebalasca

184418

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Unit 4 - Extrinsic Muscles of the tongue

Description

A&P of the ear and speech mech

Updated

2012-11-19T17:30:45Z

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