Test 4 Part 2 Flashcards
Where does spinal cord start?
Foramen magnum
Where does spinal cord end?
L1-L2
or in child more L2-L3
How many SC segments with spinal nerves?
31 segments with 31 pairs of spinal nerves
How many pairs spinal nerves in each segment of spinal cord?
8 cervical
12 thoracic
5 lumbar
5sacral
1 coccygeal
Dorsal root function?
sensory
Ventral root function?
motor
Dorsal and ventral primary rami function?
both are mixed sensory and motor
Sympathetic nervous system function
motor
pre/post ganglionic sympathetic function?
motor
Ventral Primary Rami Plexi
Cervical C1-C4 (and part of C5)
Brachial C5-T1
Lumbosacral L1-S4 (t-12 in 50% people)
Coccygeal S4 & S5
Adult spinal cord length
about 2ft
58-60 cm
23-24 inches
How long is vertebral column?
about 2.5ft
What level is Tuffier’s (Intercristal) line?
L4
How is dura matter secured to pia mater?
Denticulate ligaments
How many denticulate liagments?
21 pairs
Subarachnoid space
continous with subarchnoid space in brain
this is also called “Inter thecal”
contains CSF
Subdural space
potential space
Epidural space
Real space
contains fat
contains ant/post venous plexi
How far do spinal cord meninges continue laterally?
all the way to the spinal nerves.
Thus, anesthesia of this area would affect both motor and sensory function
What comes from lateral gray horn in T1-L2-3 region?
neuron cell bodies that originate sympathetic pre-ganglionic
T1-L2-3
sympathetic pre-ganglionic
What comes from lateral gray horn in S2-S4 region?
neuron cell bodies that originate pelvic parasympathetic pre ganglionic
Another word for white column?
Funiculus
Where do dorsal intermediate sulci start?
about T8-C1
What do fibers medial to dorsal intermediate sulci carry?
propreoceptive and tactile info from lower extremities and lower trunk
what do fibers lateral to dorsal intermediate sulci carry?
propreoceptive and tactile info from upper half of the body
