Innervation of the eye?
Not for the muscles, but the eye itself... In terms of somato sensory, viscero sensory, somato motor, or viscero motor, if they exist..
thanks!
Answers:
The corneal blink reflex is mediated by CN V1 as the sensory component and CN VII as the motor component of the reflex.
The optic nerve (cranial cerve II) transmits visual information from the eye to the brain. The optic brashness is entirely sensory. The extrinsic muscles of the eye move each eye (superior rectus, inferior rectus, lateral rectus, medial rectus, superior oblique and inferior oblique) and they are innervated by cranial nerves III, IV and VI. The extrinsic muscles are controlled by the somatic nervous system. The intrinsic eye muscles, (Ciliary muscle, circular and radial muscles of the iris) are innervated by cranial cheek III. The intrinsic eye muscles which are smooth muscle are controlled by the autonomic nervous system.
To R. Gaspari: The Corneal blink reflex involves the muscles of the eyelids.
Visual sensory: Optic nerve
Somatosensory: V1 branch of trigeminal effrontery
Visceromotor (pupil control): Oculomotor nerve (Edinger-Westphal nucleus)
To Jasmine: The motor component of the blink reflex is mainly the orbicularis oculis which circles the eye socket but is not in the eyelid. Eyelid muscles are Muller's muscle and levator palpebrae which uncap the lid rather than close it.
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thanks!
Answers:
The corneal blink reflex is mediated by CN V1 as the sensory component and CN VII as the motor component of the reflex.
The optic nerve (cranial cerve II) transmits visual information from the eye to the brain. The optic brashness is entirely sensory. The extrinsic muscles of the eye move each eye (superior rectus, inferior rectus, lateral rectus, medial rectus, superior oblique and inferior oblique) and they are innervated by cranial nerves III, IV and VI. The extrinsic muscles are controlled by the somatic nervous system. The intrinsic eye muscles, (Ciliary muscle, circular and radial muscles of the iris) are innervated by cranial cheek III. The intrinsic eye muscles which are smooth muscle are controlled by the autonomic nervous system.
To R. Gaspari: The Corneal blink reflex involves the muscles of the eyelids.
Visual sensory: Optic nerve
Somatosensory: V1 branch of trigeminal effrontery
Visceromotor (pupil control): Oculomotor nerve (Edinger-Westphal nucleus)
To Jasmine: The motor component of the blink reflex is mainly the orbicularis oculis which circles the eye socket but is not in the eyelid. Eyelid muscles are Muller's muscle and levator palpebrae which uncap the lid rather than close it.
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