Limbic System Flashcards
H.O.M.E
-Homeostasis
-Olfaction
-Memory
-Emotional drives
Limbic Cortex
-corpus callosum
-cingulate
-uncus
-parahippocampal gyrus
-temporal pole
-medial orbitofrontal gyrus
-insula
-hippocamppus
-amygdala
Olfaction
-olfactory n. < olfactory bulb < olfactory tract < primary olfactory cortex < amygdala < olfactory tubercle
Working Memory
-short term storage and handling info
-goal relevant
-need for language, prooblem solving, reasoning, multi tasking
-lateral prefrontal cortex
-temporparietal ass cortex
Declarative Memory
-memories that can be verbalized (explicit memory)
-recongnizes memory for longer term storage
-not stored in medial temporal lobe
-starts in thlamus selecting inut from temporoparietal ass cortex, encoded into med temporal lobe
- Encoding: processing, enhanced by attentiveness, arousal, reviewing
- Consolidation: stabilization of memories
-synapses through long term pootentiatioon (min-hr)
-systemic through med temporal lobe (min-decade) - Retrieval
Declarative Memory: Lobes
Medial Temporal Lobe:
-hippocampus
-fornix: connects hippocampus to mammilary bodies and thalamus
-parahippocampal gyrus
-activated <12yrs
Lateral Prefrontal Cortex:
-voluntary control over medial temp in processing and organizing
-access stored info
-analyzes language
-Retrieval: searches and verifies encooded memories in med temporal
-activated 13+yrs
Episodic Declarative Memory
-personal events
Semantic Declarative Memory
-learned common knowledge unrelated to personal events
Procedural Memory
-implicit or nonconscious
-harder to verbalize
-learned skills or habits
-perceptual skills
Learning Motor sequence: motor and parietal cortices and striatum
Learned Mmt sequence: sup motor areas and putamen/GP
- Cognitive
- Associative
- Automatic
Amnesia
-loss of declarative memory
Retrograde Amnesia
-looses memories prior to injury
-can create new memories
Anterograde Amnesia
-looses memories after injury
-post traumatic amnesia
-cannot create new mems
Separation of Procedural and Declarative
-allow ppl to learn subconsciously w/o remembering learning
-encodes enough info to be able to form mems
Remote Memory
-long term memory
Goal Directed Behavior
-make goal, plan, execute, monitor plan
Lateral PFC: goal directed behavior and working memory
-inhibits bad behavior
-formulates posibilities
Lateral PFC < head of caudate < GPe and PGi < Thalamus
Emotion
-short term subjective experience
-can influence perceptions and actions
-can trigger physiologic responses
Mood
-enduring subjectiv eongoing emotional experience
Emotion Structures
-amygdala
-Medial prefrontal cortex
-thalamus: sadness and depression
-anterior insula: awareness of feelings and internal stimuli
-emotion loop BG
Medial PFC < ventral striatum < thalamus
Amygdala
-produces fear, disgust
-interprets social signals
-important for social behavior and emotional learning
Emotional Regulation
Automatic: subconscious, ignoring, leaving
Voluntary: conscious, choosing to control emotions
Social Behavior
-ventral PFC
-connects with regions ass with mood
-steers behaviors and inhibits undesireable, activates ANS
Ventral PFR < Head caudate < Sub nigra < thalamus
-detects relevant info, self control, understands social disapproval (self awareness)
Affect vs Mood
-mood: feeling
-affect: what i’m showing
Somatic Marker Hypothesis
-gut feelings
Emotional/Social Intelligence
-ventral premotor
-amygdala
-ant insula
Stress Response
-disruption of 3 systems
-restores after response but can linger due to feelings/thinking
-Somatic: motor neurons increase tension
-ANS: sympathetic activity sends blood flow to muscles and reduces central
-Neuroendoocrine sys: adrenal medulla to release epi
Loss of Goal Directed Behavior
-lack of initiation and follow through
-seen as uncooperative or noncompliant
Apathy
-lack of emotion and insight
-may not care to eat or drink
Emotional Labile
-uncontrolled crying or laughing
-impaired reg of social behaviors
-delusion, mania, depression, anxiety
Personality
Extraversion: ventral PFR
Neurotocism: amygdala, cingulate, medial PFC, hippocampus
Agreeableness: temporoparietal ass, cingulate
Conscientiousness: lateral PFR
Intellect
-develop concepts into reason
