12 (C) Limbic System Flashcards
Romberg test =
Tests position sense . feet together eyes closed
if cerebellar + motor normal = no unsteadiness
Tabes Dorsalis // Locomotor ataxia =
destruction of the myelination of fibres
i.e. Dorsal column
Syringomyelia leads to excess …. and disruption of what?
CSF in spinal cord
interrupts decussating spinothalamic fibres
Hemiparesis on Rside of body
Motor defects = Descending cortiospinal tract
Loss of pain/temp/pressure/touch of entire Rside of body
Spinothalamic tract sensory defect
Loss of pain/temp/pressure/touch of entire Rside of Face
Trigeminothalamic tract affected
Trigeminothalamic tract runs to what part of the thalamus
VPM
Spinothalamic tract runs to what part of the thalamus
VPL
What pathway is spared in kinasethesia?
Dorsal Column Pathway
Charcot joint =
Removal of protective painful pain reflexes leads to overwear of joints
Spinothalamic tract crosses the spinal cord via what structure
Ventral white commissure
Limbic structures (HOME)
Homeostasis -> Hypothalamus
Olfactory -> Paraolfactorry area
Memory -> Hippocampus
Emotion -> Amygdala
Limbic lobes consists of what (2)
Cingulate gyrus
Parahippocampal Gyrus
Cingulum have what type of fibres
association fibres
Shape of amygdala? What lobe is it found in
Almond shape ==> Medial temporal lobe
What is the amygdala deep to?
Uncus
Lesion to the amygdala can lead to what (2)
Lack of emotions // evaluations of events
Hippocampus can be found in what lobe?
What is it deep to?
medial temporal lobe
Parahippocampal gyrus
Stria terminalis connects what?
Amygdala ===> Hypothalamus
Fornix connects what?
Hippocampus ===> Mammiliary / Hypothalamus bodies
The majority of fibres go to what before going to the amygdala?
Cortex
Allows us to give context / meaning to what we see / hear
Stria terminalis runs along what before getting to the hypothalamus
ventricular surface of thalamus in lateral ventricle
Hippocampus forms what of the interior horn of lateral ventricle
Floor
Structure of the fornix from Hippocampus => Mammiliary bodies
Fimbria => Crus => Body => Columns of Fornix => Mammilliary bodies
Circuit of Papez does what (2)
Reinforce emotions + survival responses
What part of the thalamus is used in the Circuit of Papez?
Anterior thalamus
The working memory can do what with information
temporarily hold + manipulate information
Long term memory is stored in what?
Neocortex
