Organisation Of The Spinal Cord - Edubirdie

University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

401

Pages:

4
Author:

Mariam A.

Organisation of the spinal cord       There are: o 7 cervical vertebrae. o 12 thoracic vertebrae. o 5 lumbar vertebrae. o 5 sacral vertebrae. o 4 (but variable) coccygeal vertebrae. Spinal nerves run on top of their corresponding vertebrae from C1 to C7. o E.g. cervical nerve 4 runs between C4 and C3. o There is also a cervical nerve 8 that runs between T1 and C7. From T1 and down, their nerves run below the corresponding vertebrae. o E.g. thoracic nerve 7 runs between T7 and T8. There is the same constituents of meninges in the spinal cord. However, there is a space between the dura and the vertebrae, the epidural space. Dura mater continues in the caudal direction as the filum terminale externum that attaches to the coccyx to hold the dura in place. Pia mater continues in the caudal direction as the filum terminale internum.  Rexed laminae of the grey matter are specific functional areas of the spinal cord. o Dorsal: principally sensory. o Ventral: principally motor.  Blood supply.

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