What does a withdrawal reflex employ?

What does a withdrawal reflex employ?

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.

What type of reflex is a withdrawal reflex?

polysynaptic reflex
The withdrawal reflex is a spinal reflex intended to protect the body from damaging stimuli. It is a polysynaptic reflex, causing stimulation of sensory, association, and motor neurons.

Is withdrawal reflex ipsilateral or contralateral?

In this reflex, as withdrawal from the damaging stimulus occurs in the ipsilateral leg, extension occurs in the contralateral leg as a way of maintaining balance.

Is withdrawal reflex autonomic?

One difference between a somatic reflex, such as the withdrawal reflex, and a visceral reflex, which is an autonomic reflex, is in the efferent branch. The output of a somatic reflex is the lower motor neuron in the ventral horn of the spinal cord that projects directly to a skeletal muscle to cause its contraction.

Is withdrawal reflex a cutaneous reflex?

The cutaneous withdrawal reflex in human neonates: sensitization, receptive fields, and the effects of contralateral stimulation.

Which stimulus would incite a withdrawal reflex?

This automatic response is known as the withdrawal reflex defined as the automatic withdrawal of a limb from a painful stimulus. This reflex protects humans against tissue necrosis from contact with noxious stimuli such as pain or heat. It can occur in either the upper or lower limbs.

What are the functions of the axillary nerve select all that apply?

What are the functions of the axillary nerve? Select all that apply. It provides sensory innervation to the shoulder joint and to the skin over part of the shoulder. It innervates the deltoid and teres minor muscles.

Which reflex stimulates ipsilateral extensors?

Golgi Tendon Reflex Like the stretch reflex, the tendon reflex is ipsilateral. The sensory receptors for this reflex are called Golgi tendon receptors, and lie within a tendon near its junction with a muscle.

What is the role of neuronal pools in the CNS quizlet?

The billions of neurons in the CNS are organized into neuronal pools. These functional groups of neurons integrate incoming information from receptors or different neuronal pools and then forward the processed information to other destinations.

What is meant by reciprocal inhibition of the hamstring muscle group during the patellar tendon reflex?

So an additional connection through an interneuron sends an inhibitory pathway to the antagonist of the stretched muscle – this is called reciprocal inhibition. Tendon receptors respond to the contraction of a muscle. The response reverses the original stimulus therefore causing relaxation of the muscle stimulated.

What is the relationship between the flexor withdrawal reflex and nociceptors?

Ordinarily, only nociceptors are strong enough to cause reflex withdrawal. Since a flexor reflex involves the entire limb, the pathway is spread over several segments of the spinal cord. This includes the motor neurons that innervate all of the flexor muscles of the limb.

What is an example of reciprocal innervation?

A common example of reciprocal innervation, is the effect of the nociceptive (or nocifensive) reflex, or defensive response to pain, otherwise commonly known as the withdrawal reflex; a type of involuntary action of the body to remove the body part from the vicinity of an offending object by contracting…

What is the withdrawal reflex?

The withdrawal reflex is a spinal reflex intended to protect the body from damaging stimuli. It is a polysynaptic reflex, causing stimulation of sensory, association, and motor neurons. In this article we will discuss the basic anatomy, the neural pathways and also the clinical relevance of this reflex. Key facts about the withdrawal reflex.

Which reflexes involve double reciprocal innervation of muscles?

Such reflexes involve double reciprocal innervation of muscles. Double reciprocal innervation is illustrated by the crossed-extensor reflex. If you step on a tack with your right foot, for example, this foot is withdrawn by contraction of the flexors and relaxation of the extensors of your right leg.

What stimulates reciprocal innervation in the knee jerk?

Reciprocal Innervation and the Crossed Extensor Reflex. In the knee-jerk and other stretch reflexes, the sensory neuron that stimulates the motor neuron of a muscle also stimulates interneu-rons within the spinal cord via collateral branches.