DTR Functions

Question 1

What does DTR stand for?

Answer 1

DEEP TENDON REFLEX
aka
STRETCH REFLEX
aka
MYOTATIC REFLEX

Question 2

What does the stretch reflex inform the CNS regarding muscle length?

Answer 2

RATE OF CHANGE

Question 3

The stretch reflex maintains a set muscle __________ against any change in load.

Answer 3

LENGTH

Question 4

How does the stretch reflex determine the “set muscle length”?

Answer 4

GAMMA MOTOR NEURON ACTIVATION

Question 5

The greater the degree of gamma activity, the ___________ the set muscle length.

Answer 5

SHORTER

Question 6

True or False?

The stretch reflex contraction can be sustained as long as the stretch is imposed?

Answer 6

TRUE

Question 7

Name some muscle groups where sustained stretch reflex is especially well developed? (anti-gravity muscle groups)

Answer 7

TRICEPS SURAE
QUADRICEPS
GLUTEI
ERECTOR SPINAE

Question 8

In the absence of the stretch reflex, what happens to muscle?

Answer 8

FLACCID
little resistance to movement
little tone

Question 9

Stretch reflexes are subject to strong regulation by the brain, name other factors which could impact the stretch reflex?

Answer 9

SUPRASPINAL LESIONS

EMOTIONS, STRESS