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15 Cards in this Set
- Front
- Back
mnemonic for the most important spinal cord tracts?
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"P - SAC" P-Post columns-->Touch, Proprioception Vibratory sensory: (Sensory/afferent) S-Spinothalmic tract,/Lat->pain & temp (Sensory/afferent) A-Ant/ventral Spinothalmic tract-> Touch (Sensory/afferent); C-Corticospinal Tract/ Lateral--> voluntary MOTOR/effernt, central cord syndrome UE>LE weakness
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Fig A labels the neuroforamen of four vertebral motion segments. Groups A-E lists combinations of the nerve roots which exit the corresponding neuroforamen, which group is anatomically correct? 1-Group A; 2-Group B; 3-Group C; 4-Group D; 5-Group E
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cervical spine the nerve roots exit above the corresponding pedicle. lumbar & thoracic spine the nerve roots exit below the corresponding pedicle. an extra nerve root (C8) in the cervical spine that does not have a corresponding pedicle (there is no C8 vertebral body).Ans4
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79yo M falls sustaining a hyperext injury to his neck. On motor exam, 3/5 strength = delt, elbow and wrist flex & ext. 4/5 strength= hip flex, knee flex, ext, ankle DF & PF. Sensation is preserved in UE &LE as well as his sacral segments. Injury to which of the following tracts contributes greatest to his motor function deficits?
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1- Fasciculus gracilis; 2-Fasciculus cuneatus; 3-Ant corticospinal; 4-Lat corticospinal; 5-Lat spinothalamic:::P-SAC->C-Corticospinal Tract/Lat-->MOTOR/efferent, central cord synd UE>LE weakness.Ans4
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What is major blood supply to spinal cord?
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Ant spinal artery (A) is the predominant blood supply to the spinal cord & sup the ant 2/3rds of the spinal cord. There is only one ant spinal A in comparison to the paired dorsal spinal A. The paired dorsal spinal A (B) supply the dorsal 1/3rd of the spinal cord, mainly to the dorsal columns.
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L5 palsy which motor funictions effected? Mneumonic
L5 palsy which ASAI motor funictions effected? |
MN-think 5 L--(5=side out, back/back, up4, up/up, in) 1-SIDE OUT-hip abd->gluteus medius (sup. gluteal n.) 2-BACK/back->Hip ext->hamstrings (tibial) & gluteus max (inf. gluteal n.) 3-UP-Ankle DF(ALSO L4)->tib ant (deep peroneal n.) 4-UP-Toe DF->EHL (DPN), & EDL (DPN) 5-invrsn->Foot inversion-> tib pos (tibial n.):::ASAI L5-toe long ext
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L5 palsy which sensory & reflex funictions effected?
what causes a L5 palsy |
L5-later leg and dosum foot 1st web space & N/A reflex
foraminal of far lateral disc herniation L5-s1 & paracentral or posterolateral disc herniation L4-5 |
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L4 palsy/radicolopathy which motor funictions effected?
L4 palsy which ASAI motor funictions effected/PE finding? |
Knee extension (also L3)->quad (femoral n.)
Ankle dorsiflexion (also L4) tibialis anterior (deep peroneal n.) ankle DF, cannot go from sit to stand on single leg |
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L4 palsy which sensory & reflex funictions effected?
what causes a L4 palsy |
lateral hip, anterior knee, and medial leg distal to the knee, medial malleolus & sole foot-> patellar refex absent
L4-5 foraminal (far lateral) herniated nucleus pulposis L3-4 paracentral or posterolateral disc herniation |
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S1 palsy/radicolopathy which motor funictions effected?
S1 palsy which ASAI motor funictions effected/PE finding? |
Foot PF-> gastroc-soleus (tibial n.) & Foot eversion->peroneals (SPN)
ankle PF |
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S1 palsy which sensory & reflex funictions effected?
what causes a S1 palsy |
back of leg and sole of foot & achilles reflex absent
S1-S2 foraminal (far lateral) herniated nucleus pulposis L5-S1 paracentral or posterolateral disc herniation |
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S2 palsy/radicolopathy which motor funictions effected?
S2 palsy which ASAI motor funictions effected/PE finding? |
S2 Toe plantar flexion FHL (tibial n.), FDL (tibial)
ASAI none |
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S2 palsy which sensory & reflex funictions effected?
what causes a S2 palsy |
S2 posterior thigh refex none
S2-S3 foraminal (far lateral) herniated nucleus pulposis S1-S2 paracentral or posterolateral disc herniation |
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S3,4 palsy/radicolopathy which motor funictions effected?
S3,4 palsy which ASAI motor funictions effected/PE finding? S3,4 palsy which sensory & reflex funictions effected? what causes a S3,4 palsy |
S3,4 Bowel & bladder function bladder Perianal Cremastic
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L2,3 palsy/radicolopathy which motor funictions effected?
L2,3 palsy which ASAI motor funictions effected/PE finding? L2,3 palsy which sensory & reflex funictions effected? what causes aL2,3 palsy |
L2,Hip flexion
Hip adduction iliopsoas (lumbar plexus, femoral n.) hip adductors (obturator n.) Anterior and inner thigh L3 Knee extension (also L3) |
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Cauda Equina Syndrome
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waddel--bowel and bladder dysfunction
saddle anesthesia lower extremity sensorimotor changes urgent surgical decompression within 48 hours |
