Cervical Nerve Plexus
What is the Superior Cervical Ganglion?
A big/giant mass that is the highest sympathetic ganglion in the body
What is the Cervical Nerve Plexus?
Anterior rami between C2-C3 and C3-C4
Where will you find the Roots and Trunks of the Brachial Plexus?
Between the anterior and middle scalene mm.
Where does the Ansa Cervicalis come from?
C1-C4
What does the Phrenic n. innervate?
C3,4,5 keeps you alive (diaphragm) and some part of the heart
Spinal Accessory n. goes as low as...
C6
Spinal Accessory n. is both...
Cranial and Cervical spinal
What portion of the Cervical Nerve Plexus is the Ansa Cervicalis?
Deep portion ALL motor neurons
Where does the Sympathetic Trunk lie?
Deep to the carotid sheath in the neck along the vertebral column
What is the Inferior Root of the Ansa Cervicalis also known as? Where does it come from?
Descending Cervical (C2-C3)
What is the Superior Root of the Ansa Cervicalis also known as? Where does it come from?
Descending Hypoglossal (C1)
What does the Ansa Cervicalis contain?
Descending hypoglossal (anterior) Descending Cervical (posterior)
What is the Ansa Cervicalis encased in and where does it lie?
Encased in fascia Lies on top of the carotid sheath
Point at which all cervical nerves coalesce
Erb's Point, a single injection here could anesthetize the entire neck
What does the Spinal Accessory n. ascend into the skull through?
Foramen Magnum
What does the Ansa Cervicalis innervate?
Geniohyoid ALL infrahyoid mm. (except thyrohyoid m.)
Name the nerves associated with Posterior Rami and where they come from
Greater Occipital n. (C2, C3) Third Occipital n. (C3)
Thyrohyoid m. innervation
Hypoglossus (XII)
Where is the Vagus n. (X) found?
Inside carotid sheath
Name Superficial Portion and where they come from
Lesser Occipital n. (C2-C3) Great Auricular n. (C2-C3) Transverse Cervical n. (C2-C3) Supraclavicular nn. (C3-C4) MNEMONIC: Let's Get Together Soon
Where does the Phrenic n. run?
Over the anterior surface of the anterior scalene m.
Third Occipital n. Notes
Sensory to the scalp
Greater Occipital n. Notes
Sensory to the scalp One of the biggest nerves
Posterior Rami of C1 is muscular only to...
Suboccipital muscles
What does the Sympathetic Trunk lead to?
Superior Cervical Ganglion
Superficial Portion Fact
We can ID these Mostly sensory
Hypoglossal n. (XII)
found in Cervical Plexus