The Cerebrospinal Nervous System
Mindmap on The Cerebrospinal Nervous System and its main features.
- Created by: Melissa Lyons
- Created on: 29-01-14 19:35
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- The Cerebrospinal Nervous System
- Consists of the brain, spinal cord and the peripheral nerves
- 31 pairs of nerves emerge from the spinal cord, each with two roots
- One anterior (front of the spine) root carries motor nerves - carry impulses to muscles, responsible for body movement
- One posterior (back of the spine) root carries sensory nerves - provide sensation information for brain
- 8x cervical nerves, 12x thoriac/dorsal nerves, 5x lumbar nerves, 5x sacral nerves, 1x coccygeal nerves
- 31 pairs of nerves emerge from the spinal cord, each with two roots
- 12 pairs of cranial nerves - some motor, some sensory, some both, some mixed
- 1. Olfactory - sense of smell
- 2. Optic - sense of sight
- 3. Oculo-Motor - supplies most muscles of eye (e.g pupil dilation)
- 4. Trochlear - motor nerve to external oblique muscle of eye
- 5. Trigeminal - largest cranial nerve, both motor and sensory. It supplies most skin on face and head, supplies teeth and membranes of the mouth and nose
- 6. Abducens - motor nerve to lateral rectus muscle of eye controlling eye movement
- 7. Facial - motor and sensory, muscles of expression on face, also sense of taste
- 8. Acoustic - nerve of hearing sense and balance
- 9. Glosso-Pharyngeal - mixed nerve, controls muscle of pharynx, parotid gland, part of tongue and soft palate. Nerve of taste.
- 10. Vagus - mixed nerve supplying larynx, pharnyx, lungs, heart, stomach, oesophagus, liver
- 11. Spinal Accessory - one part accompanies Vagus, other part branches to trapezius and sternomastoid muscles. Controls head movement.
- 12. Hypoglossal - controls muscles of tongue
- Consists of the brain, spinal cord and the peripheral nerves
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