Anatomy

Question 1

What is the sensation of the lower jaw?

Answer 1

• Sensory and motor fibres of V3
• Two main branches, anterior and posterior trunk
• anterior trunk: buccal nerve –> lower molars, gingiva, periosteum and skin of the cheek
• Posterior trunk:
  linguinal nerve -> anterior 2/3 tongue, muscosa of floor of mouth
  Inferior alveolar nerve -> all lower teeth
  Mental nerve -> lower lip and chin

Question 2

What is the sensation of the scalp and head?

Answer 2

Trigeminal nerve:
V1: Supraorbital nerve (forehead, anterior scalp and top of head), supratrochlear (forehead and anterior part of scalp)

V2: Zygomaticotemperoal nerve (small area of forehead and temporal area)

V3: auriculotemporal nerve (temporal area)

C2/C3 nerve root:

Lesser occipital nerve (lateral scalp behind ear)

Greater occipital nerve (posterior scalp)

Greater auricular nerve (parotid gland, mastoid process and auricle)