2: Spinal Chord Function and Dysfunction Flashcards
How many pairs of spinal nerves are there?
How are they classified?
31 Pairs
- 8 Cervical
- 12 Thoracic
- 5 Sacral
- 5 Lumbar
- 1 Coccyngeal
How do nerves leave the vertebra colum?
•Nerves leave the vertebral column through intervertebral foramina
Where are normal enlargements of the spinal chord found?
Why?
Enlargements for innervation of the limbs:
- Cervical (C3-T1)
- Lumbar (L1-S3)
How do spinal levels and vertebra levels relate to one another?
Discrepancy between spinal levels and vertebral levels
- Vertebra level: Level of the vertebra the spinal nerve emerges from the vertebra colum
- Spinal level: Level where the spinal segment has its origin
- –> Vertebra level can be much further down than spinal levels, especially at lumber + sacral region
How is the organisation of the meningeines in the spinal chord different from the one in the Brain?
In spinal chord
- ther is space between the Dura Mater and the Bone
–> has a physiological epidural space (relevant for e.g. anestesia)
What is the difference between a root and a ramus?
Root:
- e.g. dorsal root + ventral root: carry either sensory or motor information to/from spinal chord
Ramus:
- Splitting of mixed spinal nerve that either supplies the back (posterior ramus) or the front (anterior ramus)
What are the neurological termes used for
- Anterior
- Posterior
- Superior
- Inferior
Anterior= Ventral
Posterior = Dorsal
Superior = Rostal
Inferior = Caudal