Concise and easy to access notes on the anatomy of the neck for first year dental students.
Covers the neck, pharynx, larynx, ear & eye structure, the extra-ocular muscles and vestibular system.
Neck Musculature
Muscle Origin/Insertion Function Arterial Supply Nerve Supply
Unilateral and bilateral
Sternum & clavicles →
SCM contraction (skull rotates Accessory nerve
temporal bone
or is held straight)
Infra- and supraclavicular
Depresses mandible, Facial artery &
region → mandible, skin of Cervical branch
Platysma tenses skin of lower face thyrocervical
buccal region, lower lip, of CN VII
& anterior neck trunk
orbicularis oris muscle
Occipital protuberance & Moves scapula when spine
Transverse
Trapezius cervical vertebrae → if fixed, or vice-versa Accessory nerve
cervical artery
clavicle & scapula
, Pharynx
Pharynx
• Upper portion of alimentary canal,
continuous with oesophagus
• Extends from cranial base to lower
border of cricoid cartilage, where it
becomes continuous with oesophagus
Oropharynx
• Area inferior to soft palate
• Communicates anteriorly with oral cavity
• Anterior border = palatoglossal /
palatopharyngeal arches, with palatine
tonsils in between
Motor Innervation Lymphatic Drainage
• CN IX → stylopharyngeus • Mainly into deep cervical nodes
• CN X → palatopharyngeus & constrictor muscles • Also via retropharyngeal nodes
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