Reticular Formation

Question 1

the reticular formation runs from the ____ to the _____

Answer 1

Medulla to the thalamus

Question 2

Sensory input goes to the RF via

Answer 2

Parvocellular regions (lateral 1/3)
Magnocellular region (medial 2/3) (input from the cord)

Question 3

RF recieves motor imput from

Answer 3

1. the spinal cord, cerebellum, and sensorimotor cortex

2. the magnocellular region

Question 4

The RF receives autonomic input from

Answer 4

1. Cranial nerves 9 and 10 (regulation of bp, hr, and resipiration)
2. Limbic and hpothalamic inputs (modulation of pain)

Question 5

Dopamine-_________; norepinephrine-__________; serotonin-__________

Answer 5

1. ventral tegmentum
2. locus ceruleus
3. raphe nuclei

Question 6

What is the function of serotonin?

Answer 6

1. ONset of sleep
2. modulate sensory, autonomic, and motor activity through connections in strain stem and cerebellum
3. Fast acting descending pain inhibition
4. Reduces muscle tone to prevent acting out of dreams

Question 7

Wakefulness is affected by which neurotransmitters?

Answer 7

acetylcholine, serotonin, norepinephrine.

Neurons for wakefulness found in lateral hypothalamus which sends off orexin to body

Question 8

Spasticity is caused by dysfunction in

Answer 8

RF inhibition and loss of cortical reticular input

Question 9

Rigidity is caused by dysfunction

Answer 9

Loss of cerebellar excitation of inhibitory outputs from RF

Question 10

Hypertonicity

Answer 10

Loss of cerebellar input to excitatory output from RF

Question 11

What are the three functions of the RF

Answer 11

1. control of mood and emotional behavior
2. Learning and memory
3. Reinforce sexual behaviors
4. Regulate excitability of specific sensory relay nuclei
5. Maintain muscle tone

Question 12

Disorders that affect attention

Answer 12

Brain injury, MS, AD, Schizophrenia, Depression, anxiety