General sense (touch, pressure, pain, heat, cold, etc.) to the skin of the backĪ mixed nerve containing both motor and sensory fibersįrom the dorsal horn of the spinal cord to the spinal nerve Only part of the S4 ventral primary ramus is contributed to the coccygeal plexusįirst branch off of the dorsal side of the spinal nerve Ventral primary rami of spinal nerves S4, S5, C1 Skin of the superomedial portion of the buttock Lateral cutaneous branches of the dorsal primary rami of spinal nerves L1-3 Skin of the intermediate medial portion of the buttock Lateral cutaneous branches of the dorsal primary rami of spinal nerves S1-3 C2 and C3 - for trapezius via ventral primary rami of C3 and C4 from the ventral primary rami of spinal nn. is motor only the subtrapezial plexus of nerves receives proprioceptive fibers: for the sternocleidomastoid m. GSE: sternocleidomastoid and trapezius mm.Īlso known as: CN XI, 11th cranial nerve spinal root enters cranial cavity by passing through the foramen magnum exits skull by passing through the jugular foramen accessory n. Cranial root: medulla - nucleus ambiguus spinal root: spinal nucleus of the upper cervical spinal cord
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