14. Temporalis
Origin: Temporal lines on the parietal bone and the superior temporal surface of the sphenoid bone
Insertion: Coronoid process of the mandible
Action:
- Elevation of the mandible
- Retraction of the mandible
Innervation: Deep temporal nerve – a branch of the anterior division of the mandibular nerve – a branch of the trigeminal nerve (CN V3)

Needling
Position: Supine (often with head rotated to opposite side)
Palpation: Palpate this muscle in the temporal fossa
Technique:
1. Thread the needle through temporalis
2. Needle perpendicular to the temporal bone using it as a bony backdrop
Caution: Low – there is a superficial temporal artery and vein that travel with the auriculotemporal nerve superficial to this muscle

Video 2.15 Needling of temporalis, original video by Nadine Crocker, CC BY-NC 4.0.