Biological Basis of Behavior Flashcards
Peripheral nervous system subdivisions
Somatic
Autonomic
Somatic nervous system
Sends and receives sensory info that controls voluntary movements
Autonomic Nervous system
Controls automatic/involuntary functions (breathing, HR, digestion). 2 systems in this
Sympathetic NS
Mobilizing system. Fight or flight.
Parasympathetic NS
Rest and relax.
Central NS
Brain and Spinal Cord. Sensory neurons carry info into CNS (afferent), motor neurons carrying info away (efferent).
Quadriplegia
all 4 limb paralysis
Paraplegia
Leg paralysis
Paresis
Muscle weakness stemming from the severing of spinal cord.
Left Hemisphere
Controls right side. Dominant in 97% of ppl. Controls: language and motor control.
Left is for Language and Logic.
Right Hemisphere
Perceptual, visuospatial, artistic, musical, and intuitive activities.
Damage to this area can result in indifference and euphoria.
Frontal Lobes
Prefrontal – personality, emotions, inhibition (impulse control), planning, abstract thinking, judgement, language
Premotor – planning movements
Motor – Instigates motor movement
Parietal Lobes
Primary sensory area. Integration of sensations. Damage to it can result in left-right confusion and apraxia.
Gerstmann’s Syndrome
Lesions to the parietal left lobe resulting in agraphia (can’t write), acalculia, right-left disorientation, and difficulty with recognition.
Temporal Lobes
Involved in hearing/emotional behavior/memory. Damage to these lobes can result in aggression, decreased libido, and poor memory.
Occipital Lobes
Vision!
Corpus Callosum
Bundle of nerve fibers that bridge the gap between left and right hemispheres.
Limbic System
Set of structures that are involved in emotions, basic drives, learning, olfaction, and memory.
Thalamus
Sensory relay center. Receives input from everywhere and integrates and processes it before projecting it out.
Hypothalamus
Situated just below the thalamus. HOMEOSTASIS // the great regulator. Regulates temp, thirst, hnunger, sex, hormone secretion, aggression, and sleep-wake cycle. FIVE Fs.
SUPRACHIASMIC NUCLEUS in this bitch, and it does the circadian rhythm
Hippocampus
Memory.
Amygdala
Attaches emotional significance to sensory input. Associated with fear, aggression, and emotional memory. Controls fear response.
AMY is AGGRESSIVE.
Kluver-Bucy syndrome
Damage to the amygdala makes someone placid.
Septum
Moderates/decreases aggression.