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Ch. 14 The Brain and Cranial Nerves
Martini - Fundamentals of Anatomy & Physiology 11th Edition
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMartini, Nath, Bartholomew 11th EditionCh. 14 The Brain and Cranial NervesProblema 19
Capitolo 14, Problema 19

The only cranial nerves that are attached to the cerebrum are the____ nerves.
(a) optic
(b) oculomotor
(c) trochlear
(d) olfactory
(e) abducens

Guida verificata passo dopo passo
1
Step 1: Understand the anatomy of cranial nerves and their points of attachment to the brain. Cranial nerves can attach to different parts of the brain, such as the cerebrum, midbrain, pons, or medulla oblongata.
Step 2: Recall that the olfactory nerve (cranial nerve I) and the optic nerve (cranial nerve II) are unique because they are directly connected to the cerebrum, unlike other cranial nerves which connect to the brainstem.
Step 3: Identify which of the given options correspond to nerves attached to the cerebrum. The olfactory nerve is attached to the olfactory bulb, which is part of the cerebrum, and the optic nerve is connected to the diencephalon, which is also part of the cerebrum.
Step 4: Recognize that the oculomotor, trochlear, and abducens nerves are all motor nerves that originate from the midbrain or pons, which are parts of the brainstem, not the cerebrum.
Step 5: Conclude that the correct answer is the nerve(s) attached to the cerebrum, which are the olfactory and optic nerves, but since the question asks for the only cranial nerves attached to the cerebrum, focus on the olfactory nerve as the primary one attached directly to the cerebrum.

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Cranial Nerves and Their Origins

Cranial nerves are twelve pairs of nerves that emerge directly from the brain. Each nerve originates from specific parts of the brain, such as the cerebrum, midbrain, pons, or medulla. Understanding their points of attachment helps identify their functions and pathways.
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Origin and Insertion

Olfactory Nerve (Cranial Nerve I)

The olfactory nerve is responsible for the sense of smell and is unique because it arises directly from the olfactory bulb, which is part of the cerebrum. It is the only cranial nerve attached to the cerebrum, distinguishing it from others that originate from the brainstem.
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Nerves and Blood Supply

Optic Nerve and Other Cranial Nerves

The optic nerve (II) is involved in vision and arises from the diencephalon, part of the forebrain but not the cerebrum proper. Other nerves like the oculomotor, trochlear, and abducens originate from the midbrain or pons, which are parts of the brainstem, not the cerebrum.
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Nerves and Blood Supply
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