Psych 115 Midterm 2 Practice Questions and Correct Answers
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Course
PSYC 115
Institution
PSYC 115
Thalamus -gateway to the cortex -sensory/motor info passes through it to/from cortex Motor commands Vision Hearing Touch Taste (NOT smell/olfactory)
Each part of thalamus is reciprocally connected to specific parts of the ____ each part of thalamus is reciprocally connected to specific parts of th...
Psych 115 Midterm 2 Practice Questions
and Correct Answers
Thalamus ✅-gateway to the cortex
-sensory/motor info passes through it to/from cortex
Motor commands
Vision
Hearing
Touch
Taste
(NOT smell/olfactory)
Each part of thalamus is reciprocally connected to specific parts of the ____ ✅each
part of thalamus is reciprocally connected to specific parts of the CORTEX.
-cortex and thalamus are "close buddies"
Rat brain vs. Cat brain vs. Human brain ✅rat brain has NO GYRI
Cat has some
Human has MANY GYRI
Frontal lobe ✅motor control
Planning
Decision making
-damage causes paralysis, personality disorder
Cingulate gyrus/cortex ✅motivation
Emotion
Memory
Cerebral cortex: why wrinkly? ✅-single large sheet of tissue
-sulci and gyri (sulcus, gyrus) used as landmarks
-sulcus is groove, gyrus is bump
Limbic system ✅group of interconnected brain structures, cortical and subcortical. Not
all in telencephalon
-hippocampus
-amygdala
-cingulate cortex
-anterior thalamus & mammillary bodies
Hippocampus ✅"seahorse"
Learning and memory
Amygdala ✅"almond"
Emotion, anxiety
Cingulate cortex ✅cortex surrounding cingulum
Memory and emotion
Anterior thalamus and mammillary bodies ✅subcortical inputs to hippocampus and
limbic cortex regions
Basal ganglia ✅MOTOR CONTROL and DECISION MAKING
Group of interconnected brain structures
-play key role in "gating" motor commands
Ventral tegmentum and substantia nigra ✅basal ganglia areas are targets of dense
dopaminergic inputs from VT and SN
Projection neurons in cortex vs. In basal ganglia ✅cortical projection neurons in cortex
= glutamatergic (excite other areas of brain)
Projection neurons in basal ganglia = dopaminergic (inhibit other areas)
Commissures ✅carry info from one side of brain or spinal cord to the other
-axon bundles
Ex. Corpus callosum and anterior white commissure
Corpus callosum ✅major commissure that connects left and right cerebral
hemispheres in brain
Anterior white commissure ✅in spinal cord: where dorsal horn interneurons that are
excited by Adelt and C fibers cross the midline
What is white matter made of? ✅cortical regions communicate via TRACTS of axons.
-short (to nearby cortical regions)
-longer (to other parts of cortex)
-connections between hemispheres via corpus callosum
-Long, multisynaptic chains through subcortical regions
Axon bundles in CNS are called ___ and PNS are ___ ✅CNS: tracts, PNS: nerves
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