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
