Cervical Nerve Plexus

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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


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