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Like the knee jerk reflex, the Lazarus sign is an example of a reflex mediated by a reflex arc—a neural pathway which passes via the spinal column but not through the brain. As a consequence, the movement is possible in brain-dead patients whose organs have been kept functioning by life-support machines , precluding the use of complex ...
A list of reflexes in humans. Abdominal reflex; Accommodation reflex — coordinated changes in the vergence, lens shape and pupil size when looking at a distant object after a near object. Acoustic reflex or attenuation reflex — contraction of the stapedius and tensor tympani muscles in the middle ear in response to high sound intensities.
Reflex is an anatomical concept and it refers to a loop consisting, in its simplest form, of a sensory nerve, the input, and a motor nerve, the output. Autonomic does not mean automatic. The term autonomic is an anatomical term and it refers to a type of nervous system in animals and humans that is very primitive.
The hiccup is an involuntary action involving a reflex arc. [1] Once triggered, the reflex causes a strong contraction of the diaphragm followed about a quarter of a second later by closure of the epiglottis [citation needed], a structure inside of the throat, which results in the "hic" sound. Hiccups may occur individually, or they may occur ...
Reflexes include pupillary response (fixed pupils), oculocephalic reflex, corneal reflex, no response to the caloric reflex test, and no spontaneous respirations. Brain death can sometimes be difficult to differentiate from other medical states such as barbiturate overdose , acute alcohol poisoning , sedative overdose, hypothermia ...
The term is sometimes inaccurately used to refer to labored, gasping breathing patterns accompanying organ failure, systemic inflammatory response syndrome, septic shock, and metabolic acidosis. End-of-life inability to tolerate secretions, known as the death rattle , is a different phenomenon.
The stretch reflex (myotatic reflex), or more accurately "muscle stretch reflex", is a muscle contraction in response to stretching a muscle. The function of the reflex is generally thought to be maintaining the muscle at a constant length but the response is often coordinated across multiple muscles and even joints. [ 1 ]
Diving reflex in a human baby. The diving reflex, also known as the diving response and mammalian diving reflex, is a set of physiological responses to immersion that overrides the basic homeostatic reflexes, and is found in all air-breathing vertebrates studied to date.