pupillary skin reflex - Definition. Was ist pupillary skin reflex
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Was (wer) ist pupillary skin reflex - definition

ABNORMAL WHITE REFLECTION FROM THE RETINA OF THE EYE
Leucocoria; Leukokoria; White pupillary reflex

Flinching         
  • An example of reflex reversal is depicted. Activating the same spinal reflex pathway can cause limb flexion while standing, and extension while walking.
  • The simplest reflex is initiated by a stimulus, which activates an afferent nerve. The signal is then passed to a response neuron, which generates a response.
AUTOMATIC, SUBCONSCIOUS RESPONSE TO A STIMULUS
Reflex reaction; Reflexes; Reflex test; Reflectory reaction; Reflectory; Reflex, abnormal; Reflex action; Medical reflex; Body reflexes; Instinctive reflex; Involuntary action; Reflex response; Involuntary behavior; Human reflex; Flinching
·p.pr. & ·vb.n. of Flinch.
Withdrawal reflex         
SPINAL REFLEX
Pain withdrawal reflex; Pain Withdrawal Reflex; Nociceptor reflex; Flexor reflex; Flexion reflex; Nociceptive flexion reflex; RIII reflex; Nociceptive flexion response
The withdrawal reflex (nociceptive flexion reflex or flexor withdrawal reflex) is a spinal reflex intended to protect the body from damaging stimuli. The reflex rapidly coordinates the contractions of all the flexor muscles and the relaxations of the extensors in that limb causing sudden withdrawal from the potentially damaging stimulus.
Reflex arc         
  • (A) Microscopic hairs etched along the tail of the decapod activate a somatic signal (2) in response to the presence of an environmental stimulus (1). (B) The action potential activated by the somatic interneuron (3) relays an impulse to the lateral giant (LG) interneuron (4). (C) The lateral giant interneuron executes a reflex by relaying impulses to various giant motor neurons (5) within the abdomen of the lobster. These muscular contractions result in the decapod being capable of successfully propelling itself through the water, away from the site of stimulus.
REFLEX ARCS ARE NEURAL PATHWAYS WHICH CONTROL THE REFLEX
Reflex-arc; Reflex circuit; Reflex arcs; Monosynaptic reflex; Reflex Arc; Polysynaptic; Reflex pathway
A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.

Wikipedia

Leukocoria

Leukocoria (also white pupillary reflex) is an abnormal white reflection from the retina of the eye. Leukocoria resembles eyeshine, but leukocoria can also occur in animals that lack eyeshine because their retina lacks a tapetum lucidum.

Leukocoria is a medical sign for a number of conditions, including Coats disease, congenital cataract, corneal scarring, melanoma of the ciliary body, Norrie disease, ocular toxocariasis, persistence of the tunica vasculosa lentis (PFV/PHPV), retinoblastoma, and retrolental fibroplasia.

Because of the potentially life-threatening nature of retinoblastoma, a cancer, that condition is usually considered in the evaluation of leukocoria. In some rare cases (1%) the leukocoria is caused by Coats' disease (leaking retinal vessels).