To shield yourself in the event of a bear attack (just kidding.) You pull one arm back to protect it from damage, but at the same time you extend the opposite arm to help retain your balance. Also effective for fighting criminals.
describe the protective aspect of the pupillary light reflex protects the retina from excessive illumination, which is damaging to the photoreceptors describe the protective aspect of the corneal reflex protects the eye from trauma describe the protective aspect of the crossed-extensor reflex withdraws the injured limb from the painful stimulus while simultaneously extending the opposite limb. If the upper limbs are involved, extension of the opposite limb acts to push the stimulus away. If the lower limbs are involved, extension of the opposite limb prepares the limb to receive the body weight.
To protect the eye from damage from a bright light
to protect eyes from dirt and foreign objects
To Protect your eye from sudden bright light
a protective mechanism for the eye in which the eyelids close when the cornea is touched.
Protect eyes from dirt
This particular reflex is autonomic as the affected muscle, constrictor pupillae muscle, is a smooth muscle and not under conscious control. Typically if you can consciously contract the muscle, any reflex associated with that muscle is somatic in nature.
The best examples of this is to shin a light in one eye and both pupils constrict. You are testing cranial nerve II.Or the corneal reflex (touch one cornea) both eyes blink, a test of CN VII or the palpebral reflex, touch one eye lid or lashes and both eyes blink, another test of CN VII.
There are 5 somatic reflexes, stretch (spinal), crossed extensor (spinal), superficial cord (spinal), corneal (cranial), and gag (cranial).Involuntary automatic responses to sensory stimulation, for example, the knee-jerk reaction when tapped.Note: Reflexes, such as the contraction / dilation of the pupil, salivation when hungry are all controlled by autonomic reflexes.
spinal reflex
knee jerk aka patellar reflex is an example of a stretch reflex
To protect the eye from external damage.
yes it is somatic
damage to cranial nerve II
A. abdominal reflex B. Achilles jerk D. corneal reflex E. crossed extensor reflex F. gag reflex G. patellar reflex H. plantar reflex
both eyes
corneal
It is the 7th cranial nerve (facial nerve).
A reflex is an automatic response that only involves one part of an organism's body. Examples include the pupillary light reflex, patellar reflex and corneal reflex.
The corneal reflex may be elicited by lightly touching the cornea with a wisp of cotton; this sensory stimulus is transmitted by the first branch of the trigeminal nerve to the brainstem. There, thanks to connections of the trigeminal nerve with the facial (motor) nerve, a motor response occurs leading to contraction of the orbicularis oculi. The result is blinking or closing the eye on the same side. Thus this reflex is a brainstem and not a cord-mediated reflex.
This is called the gagging or the coughing reflex
It's a natural protective reflex.
Flexor Reflex