Spinal Cord Flashcards
1
Q
Spinal Cord
A
- Functions to coordinate motor information and movement patterns while providing sensory information between the brain and the peripheral nervous system
- Has the same protective meningeal covering as the brain
2
Q
Cervical, Throacic, and Lumbar Segements
A
- Inside the vertebral column, extends to approximately L1
3
Q
Connus Medullaris
A
- Sacral spinal segments
4
Q
Cauda Equina
A
- Latin “Horses Tail”
- Nerve roots L2-S5 and CO1
5
Q
Grey Matter
A
- Cell bodies of motor and sensory neurons with synapses
6
Q
3 portions of Grey Matter
A
- Upper Portion: Dorsal or posterior horn (sensory)
- Lower Portion: Anterior or Ventral horn (motor)
- Lateral Portion: T1-L2 levels contain preganglionic sympathetic neurons (produce autonomic involuntary info)
7
Q
White Matter
A
- Periphery around grey matter
8
Q
2 Tracts of White Matter
A
- Ascending Tract: Sensory Fibers
2. Descending Tract: Motor Fiber
9
Q
Tracts
A
- Communicate to nervous system, can cross from side to side of the body’s innervations. Can cause contralateral injuries
10
Q
Afferent Tracts
A
- Sensory
- 3 Types
11
Q
3 Afferent Tracts
A
- Dorsal/Posterior Columns: Provide proprioception, vibration, two point discrimination and deep touch
- Spinal Thalamic Tract; Located anteriolaterally (Pain and Temp)
- Dorsal/Ventral Columns: Light touch, pressure and sensation
12
Q
Efferent Tracts
A
- Motor
- Skilled movements of the extremities
- Originate fin the frontal lobe, crosses synapse on the anterior horn cells in the spinal cord.
13
Q
Damage to the corticospinal tract
A
- Babinski Sign
- Run blunt object across lateral border of pt’s foot
- present with great toe is in ext and remaining toes splay out
14
Q
Other Tracts
A
- Rubraspinal
- Lateral and Medial Vestibulospinal
- Tectospinal
- Medial and Lateral Reticulospinal
15
Q
Rubraspinal
A
- Innervate UE
- Facilitates flex, inhibits ext and correction of movement errors
