Intro Flashcards
Anterior roots carry efferent axons from cell bodies,located in the?
Anterior or lateral horns which attach to spinal cord by a series of rootlets
Anterior roots ( ventral or motor roots) carry what axons?
Efferent axons
The posterior roots ( dorsal or sensory) carry axons from cell bodies located in the?
Posterior root ( dorsal root) spinal ganglion
The posterior root separates into rootlets that attach to the cord at the?
Posterior lateral sulcus
The spinal ganglia are located inside or medial to the?
Intervertebral foramen beyond the dura mater
C1 andC2 ganglia located on the vertebral arches
True
Sacral ganglia located within the?
Vertebral canal
The coccygeal located inside?
Dura mater
Mixed spinal nerve, meningeal branch is given off at all spinal levels
True
Renter the vertebral canal thru if and divide into what?
Ascending, descending, transverse branches
These branches provide what info?
Somatosensory and sympathetic supply to dura, blood vessels, periosteum, intervertebral disc in the ant and lateral portions of the canal.
The mixed spinal nerve divides into?
Posterior ( dorsal ) ramus and anterior( ventral) ramus
The posterior ramus spirits into what branches?
Lateral and medial except C1
Posterior ramus is smaller than the anterior ramus except C1 S4 S5
True
The posterior ramus has motor innervation to? And sensory to?
Deep back muscles, skin on either side of spine
The anterior ramus has motor innervation to?
Anterior and lateral trunk muscles, skeletal muscles
Anterior rami contribute to the great plexus
True
The anterior ramus provides sensory info to?
Skin of extremity as well as lateral and anterior trunk
Sympathetic chain communicans are located?
Medial to the bifurcation of the mixed spinal nerve
White ramus communicans carry unmyelinated axons
False myelinated
White ramus communicans contain cell bodies in the?
Lateral horn cells at cod levels T1-L2
White ramus communicans carry preganglonic sympathetic fibers enter sympathetic chain and do what?
Synapse or pass thru splanchnic nerves
Gray ramus communicans carry what axons?
Unmyelinated postganglionic sympathetic axons from cell bodies in the sympathetic chain to the spinal nerve
Gray ramus communicans associated with each spinal nerve
True
C1 suboccipital nerve has motor supply to what muscles?
Rectus capitis posterior major and minor, obliquus capitis superior and inferior, semispinalis capitis
The C2 has two branches what are they and what do they supply?
Medial branch greater occipital nerve sensory to post neck scalp
Lateral motor supply to semispinalis capitis, longissimus capitis, splenius capitis
C3 has two branches which supply what?
Medial least occipital nerve sensory from skin of posterior neck
Lateral motor supply semispinalis capitis longissimus capitis, splenius capitis
C4-C8 two branches supply what?
Medial sensory to skin over post neck
Lateral motor supply to iliocostalis cervicis, longissimus cervicis and capitis
Cervical plexus is formed by what?
Anterior rami of C1- C4 spinal nerves
Communications with cranial nerves fibers from what ganglion communicate with the loop formed by?
Inferior Vagal ganglion C1 and C2
The spinal accessory nerve Carrywhat info?
Proprioceptive and communicate with loops of C2 C3 and C3 and C4
Spinal accessory from scm to C2 and trap C3 C4
True
The hypoglossal nerve communicates with C1 fibers and become what? And supply what?
Superior root ansa cervicalis, supply thyrohyoid and geniohyoid
Superior cervical ganglion has three gray rami communicans and carry what?
Postganglionic sympathetic vasomotor, sudomotor, pilomotor to the loop btw C1 and C2 roots of C3 and C4
Superficial branches, lesser occipital nerve carries fibers from? And supply?
C2 sometimes C3 supply skin over superior 1/3 of auricle and skin behind ear. Communicates with greater occipital nerve Nd great auric ulnar nerve- cervicogenic headache
The great auricular nerve carries fibers from? And split into what branches?
C2 C3 and anterior and posterior branches
The anterior branch of the great auricular combines with what nerve and supplies?
Facial nerve, skin over parotid gland
The posterior branch of great auricular supplies what?
Skin over mastoid process
The transverse cutaneous carries fibers? And divides into what supplying what?
C2C3 ascending and descending branches supply skin over platysma
The trunks from C3 C4 form what nerves?
Medial lateral intermediate supraclavicular nerves
The medial supraclavicular nerve supplies?
Skin over sternal end of clavicle as far as second rib
The intermediate supraclavicular supplies what?
Skin over deltoid and pec major as far as second rib
The lateral supraclavicular nerve supplies?
Skin over superior and lateral aspects of shoulder
Deep branches are divides into series medial and lateral series
True
Lateral series passes into post triangle consisting of what branches?
Communicating and muscular
The spinal accessory nerve receives info from communicating branches carry fibers from?
C2-4
The muscular branches are associated with what muscles?
Scm fibers C2 C3 C4, trap fibers C2 C3, levator scapula C3, C4 motor and sensory, middle scalene fibers C3 C4
The medial series passes into anterior triangle
True
The communicating branches of the medial series is btw what?
Vagus and loop C1 C2
Communicating branch of medial series has 3 to 4 gray rami communicans from?
Cervical ganglion to upper four cervical nerves
Communicating branch from medial series contain C1 communicating with what nerve and separated into what?
Hypoglossal nerve and superior root ansa cervicalis
The muscular branches of the medial seriesare sent what muscles?
Rectus capitis lateralis C1, rectus capitis anterior C1 C2, longus capitis C1-C3, longus colli C2- C4
Branches from C2 C3 form what?
Inferior root ansa cervicalis
Ansa cervicalis supplies what?
Sternohyoid, sternothyroid, both bellies omohyoid
The phrenic nerve is formed by what fibers?
C3- C5 most coming from C4
Phrenic nerve defends through where?
Neck anterior to ant scalene
Phrenic nerve recieves what fibers?
Postganglionic sympathetic fibers from cervical ganglia
The phrenic nerve supplies what?
Diaphragm
