neuro quiz 3? Flashcards
Where is and what is the conus medularis?
L2 (L3 for infant)
End of the spinal cord
Where is and what is the dural sac?
End of subarachnoid space
S2 adult
S3 infant
What is and where is the cauda equina?
Bundle of nerves below the spinal cord that extend to the dural sac
L2-S2
What is tethered spinal cord syndrome?
A neurological disorder where the spinal cord extends lower than normal, and a low-lying conus medularis
Meningeal layers of the spinal cord
DAP
Dura
Arachnoid
Pia
Different types of spina bifida and the most severe
Oculta- only shown by a possible hairy patch
Meningocele- protrusion of meninges only
Myelomeningocele- protrusion of spinal cord contents; most dangerous
What is the blood supply to the spinal cord?
1 anterior artery
2 posterior arteries
6-8 Radicular arteries (artery of adamkiewics T12 is the most important)
___ roots are the sensory fibers
___ roots are the motor fibers
Dorsal sensory
Ventral motor
How many cervical, thoracic, lumbar, sacral, coccygeal vertebrae
7
12
5
5
1
Dermatome of the nipples
T4
Dermatome of the belly button
T10
Dermatome of superior iliac crest
L4
2 spaces up for spinal?
What is the cervical plexus
Where is it
What does it innervate
A network of nerves that exchange sensory and motor information
C1-C4
Innervates the neck and shoulder
The phrenic nerve is usually blocked during an ___ block
interscalene
What is the Brachial plexus
Where is it
What does it innervate
Innervates upper limbs and shoulders
C5-T1
What is the lumbar plexus
Where is it
What does it innervate
L1-L4
Anterior and medial thigh
What is the sacralplexus
Where is it
What does it innervate
L4-S4
Pelvis, lower extremities
Injury to the __ can cause foot drop
Common peroneal
While in stirrups or in the lateral position
The ___ tract is the primary motor pathway
Corticospinal
The ___ test assesses the corticospinal tract
Babinski
Negative- toes squinch
Positive- toes flare out
SSEPs monitor the ___
MEPS monitor the ___
SSEP- Dorsal column/ posterior arteries
MEP- corticospinal tract/ anterior artery
Classic signs that the artery of adam is blocked
Loss of BB
Flaccid paralysis
Loss of temperature and pain
