Unit I Innervations Head and Neck Flashcards
Motor innervation of facial muscles is from
Facial Nerve (CN VII)
Sensory innervation of the face is from
Trigeminal Nerve (CN V)
Name the branches of CN V (trigeminal)
Opthalmic
mandibular
maxillary
Distribution of opthalmic
mostly to face and scalp
Distribution of maxillary nerve
mostly to cheek and lateral to orbit
Distribution of mandibular nerve
mostly to chin and temporal region
Subdivisions of opthalmic nerve
supraorbital supratrochlear external nasal infratrochlear lacrimal
Subdivisions of maxillary nerve
zygomaticotemporal
zygomaticofacial
infraorbital
Subdivisions of mandibular nerve
auriculotemporal
buccal
mental
What is Trigeminal Neuralgia?
severe pain in the area of sensory distribution of trigeminal nerve
List some manifestations of Trigeminal Neuralgia
Often due to touch, is most common in maxillary branch; cause unknown
What supplies the occipital region?
the greater occipital nerve
What primary ramus does the greater occipital nerve come form?
dorsal primary ramus of C2
What supplies the upper part of the back of the neck?
the third occipital nerve
What primary ramus does the third occipital nerve come from?
posterior primary ramus of C3
What does the third occipital nerve supply?
upper part of the back of the neck
What supplies the lower part of the back of the neck?
posterior primary ramus of C4
Is C1 strictly a motor or sensory nerve?
motor
What is the sensory innervation of the anterior and lateral aspects of the neck?
Anterior (ventral) primary rami of C2-C4
What forms the Cervical plexus?
ventral primary rami of C1-C4
What does C5-C8 supply
sensory innervation to the skin of the upper limb
What supplies the lateral part of the occipital regin, posterior to the ear?
the lesser occipital nerve
What does the lesser occiptal nerve come from?
C2
What supplies the angle of the mandible and area inferior to the ear?
the Great auricular nerve
