| A | B |
|---|
| Two major functions of the spinal cord | (1) transmits impulses to and from the brain (2) It's the integrating center for the spinal cord reflexes |
| Beginning of the spinal cord is here. | foramen magnum |
| Ending point of the spinal cord | Between first and second lumbar vertebrae |
| Tracts that carry sensory impulses to the brain | ascending tracts |
| Tracts that carry motor impulses away from the brain | descending tracts |
| The central canal holds this. | CSF (cerebral spinal fluid) |
| Number of cervical pairs of spinal nerves | 8 |
| Cervical spinal nerves supply... | back of head, neck, shoulders, arms, and the diaphragm |
| Number of thoracic spinal nerves. | 12 |
| Thoracic spinal nerves supply... | 1st thoracic nerve helps supply the arms. The remaining supply the trunk and body |
| Number of sacral spinal nerves... | 5 |
| Sacral spinal nerves supply... | hips, pelvic cavity, and legs |
| Number of coccygeal spinal nerves. | 1 |
| Coccygeal spinal nerves supply... | Nothing - they are too small. |
| Dorsal root of spinal nerve made of these types of neurons | sensory |
| Dorsal root carries impulses where? | into the spinal cord |
| Ventral root made of these types of neurons | motor |
| Ventral root carries impulses where? | From the spinal cord |
