Tag: Nerves

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Cranial Nerves made Straightforward,Mnemonic,Usmle,Plab,Anatomy

The cranial nerves are a set of 12 paired nerves that come up instantly from the mind. The primary two nerves (olfactory and optic) come up from the cerebrum, whereas the remaining ten emerge from the mind stem.

The names of the cranial nerves relate to their perform and they’re additionally numerically recognized in roman numerals (I-XII)

There are twelve cranial nerves in whole. The olfactory nerve (CN I) and optic nerve (CN II) originate from the cerebrum.

Cranial nerves III – XII come up from the mind stem (Determine 1). They’ll come up from a selected a part of the mind stem (midbrain, pons or medulla), or from a junction between two components:

Midbrain – the trochlear nerve (IV) comes from the posterior facet of the midbrain. It has the longest intracranial size of all of the cranial nerves.
Midbrain-pontine junction – oculomotor (III).
Pons – trigeminal (V).
Pontine-medulla junction – abducens, facial, vestibulocochlear (VI-VIII).
Medulla oblongata – posterior to the olive: glossopharyngeal, vagus, accent (IX-XI). Anterior to the olive: hypoglossal (XII).
The cranial nerves are numbered by their location on the mind stem (superior to inferior, then medial to lateral) and the order of their exit from the skull (anterior to posterior)

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