Pregunta
Which cranial nerve pairs are purely motor and control eye movement?
Optic, vestibulocochlear, and accessory
Olfactory, optic, and oculomotor
Oculomotor, trochlear, and abducens
Trochlear, abducens, and facial
| Which cranial nerve pairs are purely motor and control eye movement? |
| Optic, vestibulocochlear, and accessory |
| Olfactory, optic, and oculomotor |
| Oculomotor, trochlear, and abducens |
| Trochlear, abducens, and facial |
Ask by Hills Ramirez. in the United States
Mar 21,2025
Solución de inteligencia artificial de Upstudy
Respuesta verificada por el tutor
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The cranial nerves that are purely motor and control eye movement are oculomotor (III), trochlear (IV), and abducens (VI).
Solución
To determine which cranial nerve pairs are purely motor and control eye movement, let’s analyze the options provided:
-
Optic, vestibulocochlear, and accessory:
- Optic (II) is sensory (vision).
- Vestibulocochlear (VIII) is sensory (hearing and balance).
- Accessory (XI) is motor but does not control eye movement.
-
Olfactory, optic, and oculomotor:
- Olfactory (I) is sensory (smell).
- Optic (II) is sensory (vision).
- Oculomotor (III) is motor and controls eye movement.
-
Oculomotor, trochlear, and abducens:
- Oculomotor (III) is motor and controls eye movement.
- Trochlear (IV) is motor and controls eye movement.
- Abducens (VI) is motor and controls eye movement.
-
Trochlear, abducens, and facial:
- Trochlear (IV) is motor and controls eye movement.
- Abducens (VI) is motor and controls eye movement.
- Facial (VII) is primarily motor but does not control eye movement.
From this analysis, the correct answer is:
Oculomotor, trochlear, and abducens.
These three cranial nerves are purely motor and are responsible for controlling eye movement.
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Simplifique esta solución Mind Expander
The cranial nerve pairs that are purely motor and control eye movement are the oculomotor, trochlear, and abducens nerves. These three nerves are responsible for innervating the majority of the extrinsic eye muscles, allowing for precise eye movements essential for vision and coordination.
In practical terms, these nerves help us perform everyday tasks that involve tracking objects, reading, and navigating our environment. For instance, when you follow a moving car or read a book, the oculomotor, trochlear, and abducens are hard at work, moving your eyes to maintain focus and clarity.
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