Exam 1 Flashcards
Explain the exiting of nerve roots at vertebrae
at C8 the nerve roots exit below
at C1-C7 they exit above
in T spine they exit below corresponding vertebrae
end of the SC is at
conus medullarus (L2)
below L2 is the
cauda equina
peripherial nerves = potential for regeneration
injury to the spinothalmic tract would result in (contra or ipsi sx)
contra
injury to post columns (dorsal columns) would result in (contra or ipsi sx)
ipsi
injury to lateral corticospinal tract would result in (contra or ipsi)
ipsi
injury to medial corticospinal tract would result in (contra or ipsi sx)
ipsi
the spinothalmic tract is aka
anterolateral system
the anterolateral system (aka spinothalmic tract) has what functions
pain
temp
crude touch
the spinothalmic tract crosses where
in SC
the dorsal column functions
disc (fine) touch
vibration
proprioception
the dorsal column (aka post column) crosses in the
BS
the lateral corticospinal tract functions
motor to extremities
the medial corticospinal tract functions
motor to trunk
damage to the SC on one side would yield motor damage to the (contra or ipsi side of damage)
ipsi side from that level and down
overall, the corticospinal tracts are the ___ pathways
motor
overall, the dorsal columns and ant/lateral system are the ___ pathways
sensory
C5 motor level
elbow flexors
C6 motor level
wrist extensors
C7 motor level
elbow ext
C8 motor level
long finger flexors (FDP)
T1 motor level
small finger abd
L2 motor level
hip flexors
L3 motor level
knee ext
L4 motor level
ankle DF
L5 motor level
long toe ext (EHL)
S1 motor level
PF
C2 sensory location
behind ear
C3 sensory location
above clavicle
C4 sensory location
AC jt
C5 sensory location
lateral elbow
C6 sensory location
dorsal thumb (at proximal phalanx)
C7 sensory location
dorsal middle finger (at proximal phalanx)
C8 sensory location
dorsal pinky finger (at proximal phalanx)
T1 sensory location
medial elbow
T2 sensory location
axilla
T3 sensory location
3rd intercostal space (midline of clavicle)
T4 sensory location
nipple line
4th intercostal space (midline of clavicle)
T5 sensory location
5th intercostal space
T6 sensory location
xiphoid process (in midline with clavicle)
T7 sensory location
1/4 way btwn xiphoid and umbilicus (higher up)
T8 sensory location
1/2 btwn xiphoid and umbilicus
T9 sensory location
3/4 way btwn xiphoid and umbilicus
From T3-T12, use what anatomical location as marker
all are at midline of clavicle
T10 sensory location
at level of umbilicus
T11 sensory location
1/2 way btwn umbilicus and ing. lig
T12 sensory location
at ing. lig
L1 sensory location
btwn T12 and L2’s location
upper middle ant thigh
L2 sensory location
middle ant thigh
L3 sensory location
medial epicondyle of knee
L4 sensory location
medial malleolus
L5 sensory location
3rd MCP of toe
S1 sensory location
lateral calcaneous
S2 sensory location
middle of popliteal fossa
S3 sensory location
ischial tub
S4/5 sensory location
peri area
which type of SCI is more common
traumatic
what vert levels of traumatic SCI are more common and why
C5/C6
T12-L1
bc energy takes path of least resistance and these segments are very mobile
explain very basically what occurs with traumatic SCI
hemorrhaging
necrosis of gray matter
primary and secondary injury
what spinal level controls the diaphragm
C4
what levels (not specific segments but general level) of spine are more and least likely to have SCI, and describe which are more likely to be complete vs incomplete
Cervical and Lumbar are more common and are usually incomplete
Thoracic is less common but is often complete (less common bc it lacks mobility and is protected by ribs)
what is the determining factor regarding extent of injury to L spine
cauda equina involvement
what injury often accompanies a SCI
TBI
4 movement patterns that lead to SCI (MOI)
flexion
compression
flexion with rotation
hyperext
flexion SCI cause damage where
ant vertebral
2 types of flexion SCI (most common)
wedge
ant cord
diving head first on a hard surface would yield in what type of SCI
compressive (it’s a straight vertical force)
2 types of compressive SCI
burst
teardrop
explain where damage occurs with a flexion with rotation SCI
Post to ant forces cause damage to lamina, peduncle, facets fx
this type of SCI is typically seen in older pts. who fall. they can result in complete SCI, but most often result in central Cord syndrome
hyperextension
reasons for non traumatic SCI
Tumor Transverse myelitis Syringomyelia Vertebral subluxation Infection Vascular malformations
what is transverse myelitis
a non traumatic SCI, typically sudden onset, involves a specific spinal cord level, and inflammatory process
what is synringomyelia
a non traumatic SCI, a condition that causes an opening somewhere in the spinal cord – effects multiple levels –fills up with fluid
RA at what vert levels can cause a non traumatic SCI
C1/C2 – these pts can be subject to vertebral subluxation
explain complete vs incomplete SCI
complete: Both motor and sensory function absent below level of injury, including lowest sacral segments
incomplete: Some motor and sensory function preserved below level of injury, including lowest sacral segments
what are the lowest sacral segments, and why are they significant
S4 and S5 – control BB
Complete SCI – are incontinent of BandB
In order to be classified as incomplete: S4 and S5 have to be preserved in order to be classified as incomplete
S4/S5 preservation can often be predictors of prognosis
explain zone of partial preservation
Term used for patients with COMPLETE SCI who have partial preservation (i.e., sparing) of motor and/or sensory function below level of injury.
Example: Patient with complete C5 tetraplegia who can perform partial DF of his ankle.
However, keep in mind that they are still complete, so S4/5 are still not preserved
paraplegia vs tetraplegia
tetra is loss at trunk and all 4 limbs
para is B leg loss
what is ant cord syndrome
an Incomplete injury
Loss of motor function, and pain, temperature, and crude touch sensation below level of injury
So the corticospinal tracts and the spinothalmic tracts are damaged but the post column functions are preserved bc post SC is intact
cause of ant cord syndrome
often an ant spinal A stroke
what is central cord syndrome
an Incomplete injury= UE motor only effected
Typically involves cervical spine
from a fall = hyperextension injury
results in UE weakness with sparing of LE
Sparing of sacral motor and sensory function
central cord =falls = hyper ext
Pts with central cord syndrome would have more trouble with WB/walking or dressing themselves/daily ADL’s
more trouble with daily ADL’s dt UE weakness
one main cause of Brown Sequard syndrome
a hemi sectioning like a stabbing
What is Brown Sequard Syndrome
an incomplete SCI
Ipsilateral loss of proprioception, deep and discriminatory touch, vibration, & motor function
Contralateral loss of pain, temp, and crude touch
contra loss of spinothalmic tract
ipsi loss of dorsal column and corticospinal tracts
what is post cord syndrome
loss of post/dorsal column function below level of injury
often d/t stroke of post spinal A
what % of SCI occur after the original accident d/t improper mvmt/care
About 25% of SCIs occur after original insult
within the first 24 hours of a SCI, what is critical to watch for
Hypotension & neurogenic shock – disruption in sympathetic NS
hypotension and brady cardia
More common in higher level SCI
pts with SCI should be treated at what type of facility
level 1 trauma center
main med used after a SCI
Methelprednisone (steroid to decrease inflammation) is main med for SCI immediately
primary vs secondary injury of SC
Primary- Due to the insult, local deformation of cord
Irreversable
Secondary-Shortly after initial trauma, first few hours
Ischemia, axonal degeneration, inflammation
May be reversable
traumatic vs non traumatic SCI, what title of health care provider is most important for each
traumatic- orthopedist
non traumatic - neurologist
soft tissue image type
MRI
Multi-slice or spiral/helical image type
CT
what is ASIA
American Spinal Cord Association (ASIA index).
Mainstay of stabalization devices for C spine cord injury bc it provides the best stabilization
halo
how long do pts have to wear halo, what is main con
12 wks
very top heavy
when is cspine traction used over a halo, what is a con
Used when medical problems don’t allow use of other devices
they are on bedrest
when are cervical spine orthosis used (ex: a menerva brace)
Often used for cervical spine injuries that do not result in neuro deficits
cons of cspine orthosis
Often used for cervical spine injuries that do not result in neuro deficits
thoracolumbar braces are worn how long
up to 3 months
thoracolumbar surgical Rods that attach to lamina above and below injury level, these limit motion and are very stable
Avoid high torque forces
Harrington rods
special considerations of cspine pre-stabalization (precautions)
special considerations for thoracolumbar spine
Cervical: No neck ROM
shoulder flex and abd to 90 degrees only
ER may be limited
Thoracolumbar: No hip flex past 90degrees, SLR may be limited to 30
why is full elbow ext so important for pts with SCI
bc they spend a lot of time in long seated position and they need elbow ext to keep them from falling over
what is needed to be able to sit in long seated
Full shoulder extension and ER
Full elbow extension
Hamstrings to 110
during transfers for pts with SCI, what motion is needed to occur when knee is flexed
DF
what motions are required for SCI pts with ADLS
tight long finger flexors (especially for pts who have lost motor function to hands/wrists)
full hip ER
explain muscle tone for pts with a SCI
Initially flaccid (spinal shock= edema); gradual increase in tone (like stroke)
what are the 10 main complications (listed in the ppt) for pts with SCI
px decub ulcers ectopic bone postural hypotension autonomic dysreflexia mental health resp issues DVTs contractures osteoperosis
what is autonomic dysreflexia
Pathology of autonomic N.S. at injury levels above T6
Trigger: noxious stimulus below level of injury
Results in HTN, HA, profuse sweating
Can cause stroke, blindness, death
what is neurological level
Lowest segment where there is normal sensation (2) and
antigravity motor function (≥ 3)