What type of reflex is a crossed extensor reflex?
withdrawal reflex
The crossed extensor reflex is a withdrawal reflex. The reflex occurs when the flexors in the withdrawing limb contract and the extensors relax, while in the other limb, the opposite occurs.
Are stretch reflexes autonomic or somatic?
The most common categories of somatic reflexes include the stretch reflex, the inverse stretch reflex, and the withdrawal reflex. Somatic reflexes have myelinated axons connecting the CNS to the skeletal muscle cells.
Is stretch reflex autonomic?
These neurons will cause the muscle to contract, and therefore reduce the stretching of the muscle. The whole system functions as an autonomic regulation of muscle length. Posture is also a very important consequence of the stretch reflex.
What does the crossed extensor reflex do?
The crossed extensor reflex or crossed extensor response or crossed extension reflex is a reflex in which the contralateral limb compensates for loss of support when the ipsilateral limb withdraws from painful stimulus in a withdrawal reflex.
Is reflex action autonomic?
There are two types of reflex arcs: the autonomic reflex arc that affects the inner organs, and the somatic reflex arc that affects muscles.
Is the crossed extensor reflex a somatic reflex?
In our discussion we will examine four major reflexes that are integrated within the spinal cord: the stretch reflex, the Golgi tendon reflex, the withdrawal reflex and the crossed extensor reflex.
Is crossed extensor reflex cranial or spinal?
With lesions cranial to C6, a simultaneous extension of the opposite limb (the crossed extensor reflex) may occur when the tested limb flexes. The crossed extensor is a normal reflex; however, an exaggerated response is interpreted as an upper motor neuron (UMN) sign indicating loss of inhibition from the UMN.
What are autonomic reflexes?
Autonomic reflexes are unconscious motor reflexes relayed from the organs and glands to the CNS through visceral afferent signaling.
How many synapses are crossed in a reflex arc?
A neural reflex arc is characterized by peripheral afferent sensory input that is transmitted to the central nervous system and processed; the resultant action is carried by efferent motor neurons to the periphery. Thus, at least two synaptic connections are involved in every reflex arc.
Which reflexes are autonomic responses?
Categories of Autonomic Reflexes
| Organ, target cells | Reflexb | Effector response to stim afferents |
|---|---|---|
| Mucosal glands | Lower BS | Secretion |
| Eye | ||
| Iris | Mesencepalon (pupillary light reflex) | Constriction of pupil |
| Hypothal, spinal | Dilation of pupil |