Reflexes And Reflex Arcs

Front 1

Reflex Arc

Back 1

specific nerve impulse pathways

Front 2

What are the four main reflex groups?

Back 2

spinal, cranial, somatic, autonomic.

Front 3

5 components of reflex arc:

Back 3

receptors, sensory neuron, integrating center, motor neuron, effector.

Front 4

grey matter

Back 4

area of intergration. it receives/recognizes signals and sends signal into the right direction

Front 5

Monosynaptic

Back 5

sensory neuron with motor neuron

Front 6

polysynaptic

Back 6

involve interneurons and they can go in and out on the same or on the opposite side of the cord.

Front 7

stretch reflex (patellar reflex)

Back 7

1. muscle spindle signals stretch of muscle.
2. motor neuron activated and muscle contracts.
3. brain sets muscle spindle sensitivity as it sets muscle tone (degree of muscle contraction at rest)
4. antagonist muscles relax as part of reflex.

Front 8

Tendon Reflex

Back 8

operates as a feedback mechanism to control mm tension by causing muscle relaxation when muscle force becomes too extreme.

Front 9

Inhibitory interneurons of the spinal cord are also called..

Back 9

Ranshaw Cells

Front 10

What part of the mm is being stimulated during mm contraction

Back 10

golgi tendon fibres

Front 11

Tendon Reflex

Back 11

is ipsilateral poly synaptic reflex

Front 12

Golgi Tendon organs are in tendons..

Back 12

1. activated by stretching of tendon
2. inhibitory neuron is stimulated (polysynaptic)
3. motor neuron is hyper polarized and mm relaxes

Front 13

What is a flexor withdrawal reflex?

Back 13

its a ipsilateral protective withdrawal reflex that moves a limb to avoid pain.

Front 14

What is a flexor withdrawal reflex?

Back 14

its a ipsilateral protective withdrawal reflex that moves a limb to avoid pain.

Front 15

Crossed extensor reflex

Back 15

a contralateral reflex that helps to maintain balance during flexor reflex

Front 16

Achilles reflex

Back 16

causes contraction of the calf when a force is applied to the Achilles' tendon.