EX. 22: HUMAN REFLEX PHYSIOLOGY

Define reflex and reflex arc.

Be able to name, identify (location of a reflex arc component, see figure 22.1) and describe function of each element of a reflex arc that’s listed below.

Five Reflex Arc Components:1. The receptor reacts to a stimulus

2. The sensory neuron conducts the afferent impulses to the CNS.

3. The integration center consists of one or more synapses in the CNS.

4. The motor neuron conducts the efferent impulses from the integration center to an effector organ.

5. The effector, muscle fibers or glands, respond to the efferent impulses by contracting or secreting a product, respectively.

Know the differences between Monosynaptic and Polysynaptic reflexes (see figure 22.2

& 22.3).

Know the two large groups of Reflexes and discuss the various types of reflex activities from each (see pages 323-327).

Somatic Reflexes Spinal reflex

Stretch reflex

patellar reflex

achilles reflex

Crossed Extensor reflex

Superficial cord reflex

plantar reflex

Cranial Nerve reflex

corneal reflex

gag reflex

Autonomic ReflexesPupillary reflex

pupillary light reflex

consensual reflex

Ciliospinal reflex

Salivary reflex