The cranial nerves originate from?
The cranial nerves originate from? Correct Answer from the nuclei in the inferior brain surface
Explanation:
- The nerves which arise from the brain are called the cranial nerves.
- Humans and other mammals have 12 pairs of cranial nerves.
- These nerves arise or originate from the nuclei in the inferior brain surface.
- There are 3 types of cranial nerves based on their action
- Sensory
- Motor
- Mixed
Purely Sensory cranial nerves: I, II, VIII
Purely Moto r cranial nerves: III, IV, VI, XI, XII
Mixed crania l nerves: V, VII, IX, X
Important Points
- The longest cranial nerve is the Vagus nerve
- The largest cranial nerve is the Trigeminal nerve.
- The smallest cranial nerve is the Abducens cranial nerve
Additional Information
| Number of the nerve | Name of the nerve | Functions | The character of the nerves |
| 1(I) | Olfactory | Smell | Afferent |
| 2(II) | Optic | Sight or Vision | Afferent |
| 3(III) | Oculomotor | Moves eye and controls pupil | Efferent |
| 4(IV) | Trochlear | Moves eye | Efferent |
| 5(V) | Trigeminal | face sensation | Mixed |
| 6(VI) | Abducent | Moves eye | Efferent |
| 7(VII) | Facial | Moves face and salivate | Mixed |
| 8(VIII) | Vestibulocochlear | hearing and body balance | Afferent |
| 9(IX) | Glossopharyngeal | taste and swallow | Mixed |
| 10(X) | Vagus | heart rate and digestion | Mixed |
| 11(XI) | Accessory | head movement | Efferent |
| 12(XII) | Hypoglossal | tongue movement | Efferent |
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Feb 20, 2025