Talk:Accommodation reflex
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[edit] Introductory paragraph
Regarding: "The Accommodation Reflex is a reflex action of the eye, in response to focusing on a near object, then looking at distant object (and vice versa)." "Focusing on a near object" is called "accommodation", therefore, the essence of the statement is "the accommodation reflex is a reflex in response to accommodation". The sentence would be more accurate if that part read "viewing a near object". The last phrase (i.e. "then looking at distant object (and vice versa)" should be removed because viewing a distance object is not actually part of the reflex.
Regarding: "It is dependent on cranial nerve II (afferent limb of reflex), higher centres and cranial nerves III, IV and VI (efferent limb of reflex)." Unless there is some new theory, I don't believe IV and VI are involved in the reflex. Edwardian 06:35, 21 July 2005 (UTC)
- You raise good points. Technically it is true that IV is not involved... but only if you're in the the horizontal (transverse) plane of the eye. Generally, that exception aside I do believe IV is important 'cause you can't look up and down without it relaxing or contracting. It might be a question of definition... not sure. VI controls the lateral rectus and that muscle has to relax... tone has to decrease ('cause it is opposes the medial rectus). A reference would be a good thing... Nephron 07:13, 21 July 2005 (UTC)
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- Regarding "you can't look up and down without it relaxing or contracting": I'm not sure what you mean by "it" - the superior oblique muscle (innervated by IV) or the ciliary muscle? I don't think the accommodation reflex is dependent on IV and VI because you CAN look up or down or to the side and not accommodate. Edwardian 18:05, 21 July 2005 (UTC)
