Somatic Reflexes Lecture 18

Flashcards created from lecture notes on Somatic Reflexes to assist in exam preparation.

What is a reflex?

A rapid, automatic, or involuntary response to specific stimuli that preserves homeostasis.

What is the first step in a reflex arc?

Arrival of stimulus and activation of receptor.

What is the role of the sensory neuron in a reflex arc?

To transmit information from the receptor to the central nervous system.

What occurs during the integration center in a reflex arc?

The spinal cord processes information using interneurons and releases excitatory postsynaptic potentials (EPSP).

Name one type of reflex classification.

Innate Reflexes, Acquired Reflexes, Somatic Reflexes, Visceral Reflexes, Monosynaptic Reflexes, or Polysynaptic Reflexes.

What does the term 'Somatic Reflexes' refer to?

Reflexes that control skeletal muscle contractions.

What is an example of a monosynaptic reflex?

The patellar reflex (knee jerk reaction).

What type of reflex involves multiple synapses?

Polysynaptic reflex.

What is the purpose of the withdraw reflex?

To rapidly remove a body part from a harmful stimulus.

Which reflex is processed in the spinal cord, patellar reflex or gag reflex?

Patellar reflex.

How does reciprocal inhibition function in the withdraw reflex?

One motor neuron excites while another inhibits, leading to multiple effectors being activated.

What happens in a cross extensor reflex?

Simultaneous motor response on both sides of the body for balance.

Why is the withdraw reflex not considered cranial?

It allows faster motor response processing to avoid damage.

What occurs last in a typical polysynaptic reflex arc?

The effector responds.

What are the two types of locations for processing in reflexes?

Spinal and cranial.