MCAT Psych and soc terms Flashcards
(583 cards)
BThe 3 types of neurons in the nervous system
Motor neurons (efferent), interneurons, sensory neurons (afferent)
Nervous system main 2 divisions
central and peripheral
Central nervous system divisions
brain and spinal cord
Peripheral nervous system divisions
Nervous tissue outside of the brain and spinal cord. Includes 31 pairs of spinal nerves, 10 of the 12 pairs of cranial nerves (not olfactory and optic). Divided into Somatic and Autonomic.
Somatic nervous system
sensory and motor neurons in the skin, joints and muscles. Use afferent fibers for sensory, efferent for motor.
Autonomic nervous system
composed on the sympathetic and parasympathetic.
Manages INVOLUNTARY things, such as HR, temp, smooth muscle, respiration, sweating,
Sympathetic NS
Activated by situations of stress. It: Dilates pupils, inhibits salivation, relaxes bronchi, accelerated HR, Sweating stimulation or piloreception, inhibits peristalsis and secretion, stimulates glucose production and release, secretion of adrenaline and noradrenaline, inhibits bladder contraction, stimulates orgasm. THESE ARE ALL FROM T1-T12!!
Parasympathetic NS
rest and digest. Contracts pupils, stimualtes saliva, constricts bronchi, stimulates secretion and peristalsis, stimulates bile release These are all controlled from the VAGUS NERVE.
Contracts bladder, this is from the PELVIC SPLANCHNIC NERVE.
Layers of the brain covering from outer to inner
Skin, periosteum, bone, dura mater, arachnid mater, pia mater (last 3 are the meninges)
Where is CSF produced
Specialized cells in the ventricles (internal cavities) of the brain
3 basic subdivisions of the brain
forebrain, midbrain, hindbrain
Forebrain structures
Cerebral cortex, basal ganglia, limbic system, thalamus, hypothalamus
(previously called prosencephalon in embryo)
Midbrain structures
Inferior and superior colliculi
called mesencephalon in embryo
Hindbrain structures
cerebellum, medulla oblongata, reticular formation
called rhombencephalon in embryo
Cerebellum
Refined motor movements, posture and balance, speech slurring, alcohol impairs this part.
Medulla oblongata
Vitals functioning, breathing, HR, blood pressure. Pons is above and contains pathways from cortex to medulla sensory and motor.
Reticular formation
Arousal and alertness
Inferior and superior colliculi
Sensorymotor reflexes
Recieves motor and sensory info from rest of body. Superior receives visual sensory, and inferior receives auditory.
Thalamus
relay station for sensory info
Hypothalamus
maintains homestasis and integrates the endocrine system via the hypophyseal portal system that conencts it to the anterior pituitary.
Lateral (LH) - Hunger center, triggers eating and drinking
Ventromedial (VMH) - Triggers satiation or stopping
Anterior (AH) - Sexual behavior.
Basal ganglia
smoothens movement and helps maintain postural stability
Limbic system
controls emotion and memory, includes septal nuclei (pleasure seeking), amygdala (fear and aggression), hyppocampus (memory), fornix (communication within limbic system)
Neuropyschology
Study of functions and behaviours associates with specific regions of the brain.
Neuropsych research
study lesions in animals, brain stimulation, cortical mapping, EEG, Regional cerebral blood low (rCBF),