100%VERIFIED |complete
QUESTIONS AND ANSWERS |
GRADED A+.
mesocortical pathway - ANSWER ✔✔executive function: attention,
focus, depression
nigrostriatal pathway - ANSWER ✔✔from substantia nigra
(brainstem) to striatum (muscles): Parkinson's
mesolimbic pathway - ANSWER ✔✔projects to nucleus accumbens
(part of limbic system). Pleasure, reward, positive symptoms of
schizophrenia: Addiction, gambling
Tuberoinfundibular pathway - ANSWER ✔✔regulation of prolactin
(acts on pituitary). Hypersexuality in mania
, Dopamine - ANSWER ✔✔produced in substania nigra and VTA. D2
& D4 receptors most important. Elevated in the mesolimbic pathway
associated with pleasure and psychosis. Antispychotics block dopamine.
travels through mesocoritcal, mesolimbic, nigrostriatal, and
tuberinfundibular pathways
Serotonin - ANSWER ✔✔5-HT. produced in raphe nucleus. emotion,
impulses, dreams. 5HT2A receptors = atypical antipsychotics.
Norepinephrine - ANSWER ✔✔produced in locus coeruleus. arousal
and vigilance
GABA - ANSWER ✔✔inhibitory. produces calm in conjunction with
benzodiazepines.
ACTH - ANSWER ✔✔motor control, learning, memory, sleep, and
dreams. Helps with balance. Decrease in Alzheimer's disease
hypothalamus-pituitary-adrenal axis (HPA) - ANSWER ✔✔CRH,
ACTH, then cortisol. Worsens with stress and depression
hypothalamus-pituitary-thyroid (HPT) - ANSWER ✔✔TRH, TSH, T4.
Hypothyroid causes depression, weight gain, slow metabolism.
Hyperthyroid is opposite.