Pupillary light reflex - Wikipedia
The pupillary light reflex (PLR) or photopupillary reflex is a reflex that controls the diameter of the pupil, in response to the intensity of light that falls on the retinal ganglion cells of the retina in the back of the eye, thereby assisting in adaptation of vision to various levels of lightness/darkness.
Neuroanatomy, Pupillary Light Reflexes and Pathway
2023年8月8日 · The visual (retino-thalamocortical) pathway and pupillary light reflex pathway are the two essential ways through which the eye perceives and responds to changes in the environment. Multiple relays of information processing efficiently proceed from the cornea to the brain, and any lesion in the visual or the pupillary reflex pathway may result ...
Pupillary Light Reflex - StatPearls - NCBI Bookshelf
2023年7月25日 · The pupillary light reflex constricts the pupil in response to light, and pupillary constriction is achieved through the innervation of the iris sphincter muscle. Eyes allow for visualization of the world by receiving and processing light stimuli.
Reflexes and the Eye - EyeWiki
Pupillary light reflex pathway. The pupillary light reflex is an autonomic reflex that constricts the pupil in response to light, thereby adjusting the amount of light that reaches the retina [2]. Pupillary constriction occurs via innervation of the iris sphincter muscle, which is controlled by the parasympathetic system [2].
Ocular Motor System (Section 3, Chapter 7) Neuroscience Online: …
The pupillary light reflex allows the eye to adjust the amount of light reaching the retina and protects the photoreceptors from bright lights. The iris contains two sets of smooth muscles that control the size of the pupil (Figure 7.2).
Neuroanatomy, Visual Pathway - StatPearls - NCBI Bookshelf
2022年12月19日 · Pupillary Light Reflex Pathway (parasympathetic innervation pathway) The parasympathetic system constricts the pupil to protect itself when light intensity increases to an uncomfortable level by decreasing the amount of light entering the eye. The optic nerve directs the afferent limb of the reflex pathway.
Neuro-ophthalmology Illustrated Chapter 12 – The Pupil 1
2019年10月10日 · 12.2.1 Pupillary Light Reflex Pathway Pupillary constriction to light is mediated via parasympathetic (cholinergic) nerve fibers that travel along the third cranial nerve. When light is shone into one eye, both pupils constrict symmetrically …
Pupillary Reflex - an overview | ScienceDirect Topics
The light reflex consists of constriction of the pupil on shining a light into the eye. The afferent pathway of the light reflex is from the retina through the optic nerve to the optic tract where the fibres leave those which are destined for the lateral geniculate body and instead terminate in the pretectal region.
Neuroanatomy, Pupillary Light Reflexes and Pathway - PubMed
2023年8月8日 · The visual (retino-thalamocortical) pathway and pupillary light reflex pathway are the two essential ways through which the eye perceives and responds to changes in the environment. Multiple relays of information processing efficiently proceed from the cornea to the brain, and any lesion in the visual or the pupillary reflex pathway may result ...
Functional Organization of the Sympathetic Pathways Controlling …
Light-inhibited sympathetic pathways originate in retina-receptive neurones of the pretectum and the suprachiasmatic nucleus (SCN): by attenuating sympathetic activity, they allow unimpeded operation of the light reflex. Light stimulates the noradrenergic and serotonergic pathways.