Your question: What are spinal and cranial reflexes?

What are cranial & spinal reflexes explain with examples?

Other spinal reflexes involve more than one synapse (see polysynaptic reflex); an example is the withdrawal reflex of the hand from a painful stimulus (such as fire). Cranial reflexes are mediated by pathways in the cranial nerves and brain; examples are the blinking and swallowing reflexes. See also conditioning.

What are the spinal reflexes?

Spinal reflexes are those in which the sensory stimuli arise from receptors in muscles, joints and skin, and in which the neural circuitry responsible for the motor response is entirely contained within the spinal cord.

What’s a cranial reflex?

a reflex mediated by one of the cranial nerves, such as the blink reflex in response to a bright light or to a touch to the cornea.

What are examples of cranial reflexes?

Cranial reflexes such as salivation, sneezing, and blushing are all involuntary actions. While scratching is a voluntary action and is controlled by the spinal nerves of the brain. Additional information: A reflex is very fast, involuntary response to a stimulus.

Why are spinal reflexes important?

Spinal reflexes contribute to normal muscle tone and mediate a number of simple motor responses (e.g. withdrawal from a painful stimulus). The spinal cord also contains more complex neuronal networks called central pattern generators (CPGs).

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What is an example of Polysynaptic reflex?

An example of a polysynaptic reflex arc is seen when a person steps on a tack—in response, their body must pull that foot up while simultaneously transferring balance to the other leg.

What is the simplest type of reflex?

A monosynaptic reflex arc is the simplest type of reflex arc.

Is blinking a cranial reflex?

Anatomy. The afferent limb of the blink reflex is mediated by sensory fibers of the supraorbital branch of the ophthalmic division of the trigeminal nerve (cranial nerve V1) and the efferent limb by motor fibers of the facial nerve (cranial nerve VII).

What are autonomic reflexes?

Autonomic reflexes are unconscious motor reflexes relayed from the organs and glands to the CNS through visceral afferent signaling.