Reflex Definition Anatomy

Any reflex whose origin is in the brain. Medical definition of reflex.

Flexor Withdrawl Reflex

A reflex is a rapid involuntary response to a stimulus.

Reflex definition anatomy. A reflex arc is a neural pathway involved in a reflex. A reflex is an unlearned rapid involuntary and predictable response. It is not controlled by higher functioning centre ie.

The knee jerk is an example of the simplest type of reflex. The reflex arc consists of 5 components. Reflex arcs that contain only two neurons a sensory and a motor neuron are considered monosynaptic.

The stretch reflex is the contraction of a muscle that occurs in response to its stretch. The other option is to use this sensory information to initiate a pre programmed reflex. A reflex arc is the pathway traveled by the nerve impulses during a reflex.

Examples of monosynaptic reflex arcs in humans include the patellar reflex and the achilles reflex. A reflex is built into the nervous system and does not need the intervention of conscious thought to take effect. Most reflexes are spinal reflexes with pathways that traverse only the spinal cord.

When the knee is tapped the nerve that receives this stimulus sends an impulse to the spinal cord where it is relayed to a motor nerve. The brain and is a monosynaptic response that is transmitted to the spinal cord. Reflex definition noting or pertaining to an involuntary response to a stimulus the nerve impulse from a receptor being transmitted inward to a nerve center that in turn transmits it outward to an effector.

Our body needs to be able to respond without our cortical input. Reflexes or reflex actions are involuntary almost instantaneous movements in response to a specific stimulus. For example the corneal reflex is the blink that occurs upon irritation of the eye.

Reflexes Physiopedia