Spinal Cord Flashcards
Spinal cord extends from ________ ________ to ________ vertebrae
Five parts of spinal cord (superior to inferior)
How many nerves in each part?
Foramen magnum, L1
8 Cervical (C1-C8)
12 thoracic (T1-T12)
5 lumbar (L1-L5)
5 sacral (S1-S5)
1 coccygeal (co1)
Spinal cord is ________ than vertebral canal
________ ________ is the tapering inferior end of spinal cord
- ________ ________ is the “horse’s tail” - axons that extend inferiorly from spinal cord’s conus medullaris
- ________ ________: thin strand of pia mater within cauda equina that attaches conus medullaris to coccyex
Shorter
Conus medullaris
- Cauda equina
- Filum terminale
Dura mater in spine has how many layers?
- stabilizes spinal cord
- fuses with CT around spinal nerves
________ ________ sits between dura and periosteum of vertebrae
Epidural is given in fat filled space
Narrow ________ ________ is a potential space separating dura mater from deeper arachnoid mater
1
Epidural space
subdural
The subarachnoid space is filled with ________
________ ________ is the innermost meninx that adheres directly to the spinal cord
Consists of a delicate layer of elastic and collagen fibers
Paired, lateral, triangular extensions of pia mater called ________ ________, suspend and anchor spinal cord laterally to dura mater
CSF
Pia mater
Denticulate ligament
Lumbar puncture
Procedure to obtain a sample of ________
- Need must pass through skin, dura mater, arachnoid mater, and into ________ ________
- Normally done at ________ or ________ vertebrae to make sure spinal
- Between ________ and ________, there is no spinal cord but there is a menginges
Landmark: supracristal line passes through ________ spinous process
Epidural:
- Needle never pierces ________ mater
- Medication is introduced in ________ ________
- Medication diffuses to affect spinal nerves
CSF
- subarachnoid
- L3-L4, L4-L5
- L2 and S2
- L4
- Dura
- Epidural
The cervical enlargement is located in the ________ ________ part and innervates ________ limbs
The lumbosacral enlargement extends through the ________ and ________ parts and innervates ________ limbs
External surface of cords has two longitudinal depressions
- ________ ________ ________ with anterior spinal artery
- ________ ________ ________
Which is wider than which?
Cervical enlargement, upper
lumbosacral, lumbar and sacral, lower
- anterior median fissure
- posterior median sulcus
Gray matter contains:
White matter contains:
Funiculus= ________
what are the 3 funiculus:
Anterior funiculi connected by ________ ________
Axons within each funiculus form ________`
Dendrites, neuron cell bodies, unmyelinated axons, glial cells
Myelinated axons
Anterior, posterior, lateral funiculus
White commisure
Tracts
Lateral horns are only in ________ and ________ vertebrae
________ horns house somas of somatic motor neurons
________ horns house somas of autonomic motor neurons
- only found in T1-L2
________ horns house axons of sensory neurons and cell bodies of interneurons
Gray commissure contains ________ axons for communication between right and left side.
- Houses ________ ________
thoracic, lumbar
anterior
lateral
posterior
Unmyelinated
- central canal
________ ________ is posterior horns contain interneuron cell bodies of ________ sensory nuclei and ________ sensory sensory nuclei
________ ________ is in the anterior horns contain ________ ________nuclei
________ ________ nuclei are in the lateral horns
Sensory nuclei, somatic, autonomic
Motor nuclei, somatic motor
Autonomic motor
Tactile receptors, proprioreceptors are ________ sensory receptors
Baroreceptors, chemoreceptors are ________ sensory receptors
Cardiac muscle, smooth muscle, glands have ________ ________ effectors
Skeletal muscle has ________ effector
Somatic
Visceral
Autonomic (visceral)
Somatic
CSF from the fourth ventricle passes through the ________ ________ to enter the subarachnoid space
lateral aperture
The ________ cerebellar peduncles connect the pons to cerebellum
Middle
Bowman’s glands in the ________ ________ secrete mucin
Lamina propria
Filum terminale are thin strands of ________ mater
Pia
Stimulus from a nociceptor would travel through the ________ root to ________ the spinal cord
Posterior enter
