Question

Answer the following about CN: XII

- Name
- Function
- Test
- + for test
- Safety
- MOI

Answer 1

The twelve cranial nerves serve various sensory and motor functions and are categorized into sensory, motor, and both sensory and motor nerves. The mnemonic 'Some Say Marry Money But My Brother Says Brains Beauty Matter More' corresponds to their basic functions, aiding in memorization.

Step-by-step explanation:

The twelve cranial nerves are essential for various sensory and motor functions, falling into three categories: sensory, motor, or both sensory and motor. The mnemonic 'Some Say Marry Money But My Brother Says Brains Beauty Matter More' helps in remembering the basic functions of each nerve.

• Olfactory (CNI) - purely sensory, related to the sense of smell.
• Optic (CNII) - purely sensory, related to vision.
• Vestibulocochlear (CNVIII) - purely sensory, related to hearing and balance.
• Oculomotor (CNIII), Trochlear (CNIV), and Abducens (CNVI) - all motor, controlling eye movements.
• Spinal Accessory (CNXI) and Hypoglossal (CNXII) - strictly motor, involved in neck and shoulder movement, and tongue movements respectively.
• Trigeminal (CNV), Facial (CNVII), Glossopharyngeal (CNIX), and Vagus (CNX) - contain both sensory and motor fibers, with responsibilities ranging from facial sensations and movements to taste and visceral responses such as the gag reflex.