Nerves of the Head and Neck - including Cervical Plexus Flashcards
Identify the structures in the following image:
- Hypoglossal nerve (CNXII)
- Common carotid artery
- Ansa cervicalis (superior and inferior roots)
- Vagus nerve (CNX)
- Subclavian artery and vein
- Phrenic nerve
- Accessory spinal nerve (CNXI)
- Internal jugular vein
- Lesser occipital nerve
- Great auricular nerve
What nerve is this?
What spinal roots contribute to this?
Sensory or Motor?
What does this nerve innervate?
Greater Auricular Nerve
C2 + C3
Superficial Sensory
Skin anterior, inferior and over the ear, and over the parotid glands.
What nerve is this?
What spinal roots contribute to this?
Sensory or Motor?
What does this nerve innervate?
Transverse Cervical
C2 + C3
Superficial Sensory
Skin over the anterior aspect of the neck
What nerve is this?
What spinal roots contribute to this?
Sensory or Motor?
What does this nerve innervate?
Supraclavicular Nerve
C3 + C4
Superficial Sensory
Skin over superior portion of chest and shoulder
What nerve is this?
What spinal roots contribute to this?
Sensory or Motor?
What does this nerve innervate?
Lesser Occipital Nerve
C2
Superficial Sensory
Skin of scalp, posterior and superior to the ear
What nerve is this?
What spinal roots contribute to this?
Sensory or Motor?
What does this nerve innervate?
Ansa Cervicalis
C1-C3
(Superior Root - C1 / Inferior Root C2 + C3)
Deep Motor
Infrahyoid and geniohyoid muscles of the neck
What nerve is this?
What spinal roots contribute to this?
Sensory or Motor?
What does this nerve innervate?
Phrenic Nerve
C3, C4 + C5
Deep motor
Diaphragm
Identify the nerves of the cervical plexus:
What spinal roots contribute to each nerve?
- Hypoglossal nerve - CNXII
- Accessory nerve - CNXI
Contributions from C2, C3 and C4 - Nerve to geniohyoid
C1 via hypoglossal nerve - Nerve to thyrohyoid
C1 via hypoglossal nerve - Nerve to superior belly of omohyoid
C1-C3 via ansa cervicalis - Nerve to sternothyroid
C1-C3 via ansa cervicalis - Nerve to sternohyoid
C1-C3 via ansa cervicalis - Nerve to inferior belly of omohyoid
C1-C3 via ansa cervicalis - Greater auricular nerve
C2 + C3 - Lesser Occipital nerve
C2 - Transverse Cervical nerve
C2 + C3 - Supraclavicular nerve
C3 + C4 - Phrenic nerve
C3, C4 + C5 - nerve to brachial plexus
