exercise 17
Posterior white column
#1
Posterior Median Sulcus
#10
Anterior Median Fissure
#14
Dorsal root ganglion
#2
Lateral white column
#2
Dorsal Root
#23
Dorsal Root Ganglion
#24
Ventral Root
#25
Anterior white column
#3
Dorsal horn
#3
Central canal
#4
Dorsal Horn
#5
Dorsal root
#5
Lateral Horn
#6
Ventral root
#6
Ventral Horn
#7
Gray Commissure
#8
ventral horn
#8
Central Canal
#9
common fibular
(lateral) spinal roots: L4-S2 innervated: muscular- biceps femoris, cutaneous- skin of anterior surface of leg
tibial
(medial) spinal roots: L4-S3 innervated: muscular- hamstring muscles, cutaneous-skin of posterior surface of leg
cervical enlargement
(yellow) description: spindle-shaped swelling of the spinal cord function: provide room for dorsal and ventral roots
dorsal rami
(part that sticks out) description: part of the spinal nerve that divides posterior function: contains somatic and visceral motor fibers that innervate the skin
lumbar enlargement
(blue)description: spindle-shaped swelling of the spinal cord function: provide room for dorsal and ventral roots
denticulate ligament
3. description: saw-toothed shelved of pia mater function: secure spinal cord to bony part of vertebral column
splanchnic nerves
4. function: axon can travel through without
Dorsal Root Ganglion
Description: Enlarged area of the dorsal root Function: contains cell bodies of neurons
Dura Mater
Description: Part of the spinal meninges, outermost covering of spinal cord Function: keeping in cerebrospinal fluid
Posterior Median Sulcus
Description: a groove in the posterior side of spinal cord function: divide spinal cord in half
Ventral Root
Description: connected to ventral horns on spinal cord Function: axons of motor neurons send message out to effectors
Lateral white column
Description: lateral part of white matter function: tissue through which messages pass between different areas of gray matter
Lateral Horn
Description: lateral side of gray matter on spinal cord Function: transmission of neural signals
Central Canal
Description: middle hole in gray matter function: passage way for cerebrospinal fluid (CSF)
Gray Commissure
Description: middle portion of gray matter function: communicates between left and right side of body
Ventral Horn
Description: part of gray matter, contains somatic motor nuclei function: transmission of neural signals
pia mater
Description: part of the spinal meninges, intermost layer of menigeal Function: protective membrane that covers the brain and spinal cord
Arachnoid mater
Description: part of the spinal meninges, middle meningeal layer Function: protective membrane that covers the brain and spinal cord
Dorsal Horn
Description: posterior part of gray matter Function: transmission of neural signals
Posterior white column
Description: posterior part of white matter on spinal cord Function: tissue through which messages pass between different areas of gray matter
Dorsal Root
Description: sensory root of spinal nerve Function: where the interneurons and sensory fibers enter the spinal cord
Filum terminale
Description: slender strand of fibrous tissue function: provides longitudinal support to the spinal cord
conus medullaris
Description: tapered, cone-shaped portion of spinal cord; inferior to lumbar enlargement Function: gives rise to the filum terminale
Anterior Median Fissure
Description: the more open ventral fissure of white matter in spinal cord function: divide spinal cord in half
plexus
complex network of nerves
cauda equina
description: collection of spinal nerves located at the inferior end of vertebral canal function: bundle of nerves that send messages throughout the body
ventral rami
description: part of the spinal nerve that divides anterior function: contains axons that supply the ventrolateral body surface
sympathetic trunk
function: allows for preganglionic and ganglonic nerves fibers to communicate with each other
obturator
spinal root: L2-L4 innervated: muscular-gracilis, cutaneous-sensory for skin of medial thigh
femoral
spinal root: L2-L4 innervated: muscular-pectineus, cutaneous-skin of anterior and medial thigh
ulnar
spinal root: medial cord (c8,t1) innervated: muscular-flexor carpi ulnaris, cutaneous-skin of medial third of hand
radial
spinal root: posterior cord (c5-c8, t1) innervated: muscular-triceps brachii, cutaneous-skin of posterior and lateral surface of entire limb
sciatic nerve
spinal roots: L4-S3 innervated: muscular- semitendinosus, cutaneous-lower leg
phrenic nerve
spinal roots: c3-c5
musculocutaneous
spinal roots: lateral cord (c5-c7) innervated: muscular- biceps brachii cutaneous-skin on anterior lateral forearm
median
spinal roots: medial cord (c8,t1), lateral cord (c5-c7) innervated: muscular- palmaris longus cutaneous-skin of lateral two-thirds of hand
axillary
spinal roots: posterior cords (c5-c6) innervated: muscular-deltoid muscle, cutaneous-skin of shoulder region