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kaya mo yan philyp > limbic system > Flashcards

limbic system Flashcards

1
Q

Gray matter in medial and basal parts of the hemisphere that forms a border around the brainstem

A

Limbic Lobe

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2
Q

the limbic is aka

A

synthetic Lobe

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3
Q

the limbic system controls _____

A

emotion, behavior and drive

Memory

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4
Q

what are the connecting pathways

A

alveus
fimbria
fornix
mammilothalamic tract
stira terminalis

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5
Q

what makes up the hippocampal formation

A

hippocampus
dentate gyrus
parahippocampal gyrus

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6
Q

seahorse in coronal section

A

hippocampus

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7
Q

Convex ventricular surface covered with ependyma, beneath which lies a thin layer of white matter

A

alveus

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8
Q

Curved elevation of gray matter extending throughout the entire length of the floor of the inferior horn of the lateral ventricle

A

Hippocampus

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9
Q

expanded anterior end of hippocampus

A

Pes hippocampus

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10
Q

consists of nerve fibers that have originated from the hippocampus

A

Alveus

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11
Q

alveus will converge medially to form _____

A

fimbria

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12
Q

Fimbria is continuous with the ______

A

crus of the fornix

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13
Q

Hippocampus terminates where

A

posteriorly beneath the splenium of the corpus callosum

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14
Q

Narrow, notched band of gray matter between the fimbria of the hippocampus & parahippocampus

A

Dentate gyrus

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15
Q

the dentate is cont anteriorly c _____

A

uncus

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16
Q

the dentate is cont posteriorly c _____

A

indusium griseum

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17
Q

thin; vestigial layer of gray matter covering the superior surface of the corpus callosum

A

Indusium griseum

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18
Q

Embedded in superior surface of indusium griseum

A

medial & lateral longitudinal striae

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19
Q

remnants of white matter of vestigial indusium griseum

A

Striae

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20
Q

Between the hippocampal fissure and collateral sulcus

A

Parahippocampal Gyrus

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21
Q

Situated partly anterior and partly superior to the tip of the inferior horn of the lateral ventricle

A

Amygdaloid Nucleus (Amygdala)

22
Q

emerges from posterior aspect of amygdaloid nuc

A

Stria terminalis

23
Q

Anteriorly, the body of the fornix is connected to the corpus callosum by the

A

septum pellucidum

24
Q

Fimbria now leaves the posterior end of the hippocampus as

A

crus of fornix

25
Q

2 crura connected by transverse fibers

A

commissure of the fornix

26
Q

Crura converge to form the

A

body of the fornix

27
Q

Body of the fornix splits anteriorly into

A

2 anterior columns of the fornix

28
Q

Each column disappears into the lateral wall of the 3rd ventricle to reach

A

mammillary bodies

29
Q

connects the mammillary body with anterior nuclear group of thalamus

A

Mammillothalamic tract

30
Q

Mammillothalamic tract is responsible for

A

Memory

31
Q

emerges from posterior aspect of amygdaloid nucleus and runs a bundle of fibers posteriorly in the roof of the inferior horn of the lateral ventricle on the medial side of the tail of the caudate nucleus

A

Stria terminalis

32
Q

stria terminalis is responsible for

A

Control of autonomic, neuroendocrine and behavioral responses

33
Q

3 layers of hippocampus

A

Molecular layer - superficial; nerve fibers and scattered small neurons

Pyramidal layer - large pyramid-shaped cells

Polymorphic layer - inner

34
Q

3 layers of dentate gyrus

A

Molecular layer

Granular layer - densely arranged rounded or oval neurons with axons terminating on dendrites of pyramidal cells of hippocampus

Polymorphic layer

35
Q

Declarative (Explicit) Memory

A

conscious recall of facts and experiences

36
Q

Nondeclarative (Implicit) memory

A

Nonconscious learning of skills, habits and other acquired behaviors

37
Q

2 types of declarative memory

A

Semantic
Episodic

38
Q

Semantic (Nonunique, generic)

A

memory of culturally and educationally acquired encylopedic knowledge such as meaning of words, arithmetical facts, geography, history

39
Q

Episodic (Unique)

A

memory of personally experienced facts and events with special spatial and temporal localization

40
Q

loc of semantic

A

Temporal neocortex

41
Q

loc of episodic

A

Mesial temporal cortex (hippocampus, entorhinal cortex, perirhinal cortex and parahippocampal gyrus

cortico-cortical connections from anterior neocortices to entorhinal cortex, hippocampus-mamillary bodyanterior and medial thalamic nuclei via fornix and mammillothalamic tract; basal forebrain cholinergic nuclei (nucleus basalis of Meynert)

42
Q

Short Term Memory

A

Memory of a limited amount of information held continuously in consciousness for a short period (<60s)

Decays in seconds if not refreshed continuously

43
Q

loc of short term memory

A

Left hemisphere dominant

44
Q

left prefrontal cortex

A

verbal

45
Q

right prefrontal cortex

A

nonverbal

46
Q

Implicit Memory

A

Supports the learning and retention of skills

“Knowing how”

47
Q

Procedural (skill learning)

A

repeated performance of a motor act enhances and automates future skill for the same act; resistant to forgetting

48
Q

Priming

A

short-lived enhancement of perceptually based performance following a recent exposure to visually similar material

49
Q

Procedural (skill learning) loc

A

Functions of subcortical circuits particularly the basal ganglia and cerebellum

50
Q
A

kaya mo yan philyp (5 decks)

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