Which of the following is an example of spinal reflex?

What is an example of spinal reflex?

The knee jerk is an example of the simplest type of reflex. 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. This causes the quadriceps muscle at the front of the thigh to contract and jerk the leg up.

What type of reflex is a spinal reflex?

Monosynaptic reflex. The monosynaptic reflexes consist of two neurons. The first is located within the spinal ganglion. This is the sensory neuron (afferent) whose peripheral process detects the stimuli from the muscle.

What is a spinal cord reflex?

Introduction. Spinal cord reflexes are simple behaviors produced by central nervous system (CNS) pathways that lie entirely within the spinal cord. The sensory afferent fibers that evoke these reflexes enter the spinal cord and activate spinal motor neurons directly or through a chain of one or more spinal interneurons …

Which is an example of a reflex that is controlled by the spinal cord?

Muscle spindles. The familiar knee-jerk reflex, tested routinely by physicians, is a spinal reflex in which a brief, rapid tap on the knee excites muscle spindle afferent neurons, which then excite the motor neurons of the stretched muscle via a single synapse in the spinal cord.

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What is the function of spinal reflex?

Spinal reflex control allows your body to react automatically without the effort of thought. The reflex arc is a nerve pathway involved in a reflex action. In your vertebrae, most sensory neurons do not pass straight to the brain but synapse in the spinal cord.

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 are the characteristics of a spinal reflex?

A spinal reflex requires an intact reflex arc (muscle receptors, sensory axons within a peripheral nerve and dorsal root, lower motor neuron and its axon, muscle). No central input is required for a spinal reflex. However, sensory information may also be relayed to the brain and may result in additional behaviors.

What are the components of spinal reflex?

The simplest example of a spinal reflex is the monosynapic reflex arc, having four components:

  • A receptor (in this case, the muscle spindle).
  • An afferent component (sensory input).
  • A central component (spinal processing).
  • An efferent component (motor output).

What are 3 reflexes in humans?

Types of human reflexes

  • Biceps reflex (C5, C6)
  • Brachioradialis reflex (C5, C6, C7)
  • Extensor digitorum reflex (C6, C7)
  • Triceps reflex (C6, C7, C8)
  • Patellar reflex or knee-jerk reflex (L2, L3, L4)
  • Ankle jerk reflex (Achilles reflex) (S1, S2)