Question

What are Cerebral reflexes?

Answer 1

A reflex action is also known as a reflex. It's an involuntary and almost instantaneous movement in response to a stimulus. When any person accidentally touches a hot or a sharp object, they automatically jerk their hand away from it without thinking. A reflex does not require any of the thought input or thought process. The path taken by the nerve impulses in this process is called a reflex arc. There are two types of reflex arcs mainly: the autonomic reflex arc, affecting inner organs, and the somatic reflex arc, affecting muscles of the body.

Complete answer:
Cerebral reflexes are those which involve the brain. They occur in the organs which are present in the head as these organs are directly connected to the brain. For example, closing of eyes when exposed to bright light is an example of cerebral reflex action. The corneal reflex also known as the blink reflex. It's an involuntary blinking of the eyelids elicited by stimulation of the cornea of the eye (such as by touching or by an external foreign body). Stimulation should be elicit, both the direct and the consensual response (response of the opposite eye). This reflex occurs at a rapid rate of $0.1$ seconds mostly. This reflex results in the protection of the eyes from the foreign bodies and bright lights (the latter known as the optical reflex). The blinking reflex also occurs when sounds greater than $40-60$ dB is made.

Note:
The first reflexes develop in the womb. After seven and a half weeks of conception, the first reflex can be observed; stimulation around the mouth of the fetus causes the lips to be turned toward the stimulus. From birth itself, sucking and swallowing reflexes are ready for use. When we touch the baby’s lips, it induces sucking, and touching the back of its throat induces swallowing in it.