diffuse modulatory systems () ONLY

Question 1

1a. What dopaminergic nucleus projects axons to the dorsal striatum?

Answer 1

pars compacta

Question 2

2a. what part of the neuron contains the dopamine reuptake transporters in classical & extrasynaptic neurotransmitter communications?

Answer 2

varicosities for diffuse system & synaptic bulb for classic system

Question 3

3a. does histaminergic stimulation of H1 receptors enhance or inhibit wakefeulness & attention

Answer 3

enhance wakefulness & attention; antihistamines inhibit them & make them drowsy

Question 4

4a. What acetylcholinergic complex projects axons to the reticular formation to initiate muscle atonia during REM sleep?

Answer 4

one in midbrain: lateraldorsal tegmental nucleus & pedunculopontine nucleus

Question 5

5a. what fiber bundle conveys acetylcholinergic fibers from septal nuclei to habenular nuclei?

Answer 5

stria medularis

Question 6

6a. do enkephalinergic interneurons mediate serotonin’s inhibitory or its stimulatory effect on pain transmission in dordsal horn of spinal cord?

Answer 6

inhibitory; since its often gabinergic

Question 7

7a. what fiber bundle conveys habenular axons to interpeduncular nucleus?

Answer 7

fasciculus retroflexus

Question 8

8a. what adrenergic receptor is activated in spinal dorsal horn neurons by descending fibers originating in locus coeruleus to suppress pain transmission

Answer 8

alpha 2 receptor