11.30 Limbic System Flashcards
extreme condition of lack of limbic system drive… no motivation. seems completely disconnected from environment. what is this called?
akinetic mutism
what are the main things the insula processes?
taste pain disgust center of empathy sense of humor visceral/vestibular signals
where is the center for empathy in your brain?
the insula
hyperactivity of the amygdala would present in:
lack of fear, lack of fear learning,
inability to read facial expressions,
failure to make eye contact,
failure to perceive personal space
function of autonomic centers in the limbic lobe
receive limbic output, it is the effector for the rest of the body to support the decided behavior
_________ is the source of dopamine for the limbic structures of the brain
the VTA
input to the basolateral nuclei of the amygdala
input is all sensory modalities, everything runs through the amygdala
function of the basolateral nuclei of the amygdala
attribute emotional significance to all incoming stimuli, valuation
what is the role of the limbic system?
emotion
memory
to transform motivations, drives, and desires into emotions and actions
decision making/social behavior
the limbic lobe has _________ __________, meaning that the system does not show a strict localization of function
distributed processing
basolateral nuclei send inputs to all area of the cortex, and importantly the _________ __________
centromedial nuclei
what are the 5 core components of the limbic system
hypothalamus amygdala hippocampus anterior cingulate insula medial/orbital prefrontal cortices
function of the nucleus accumbens in the limbic lobe
reward processing
what would happen with a lesion (hyperactivity) in the anterior cingulate?
cause complete cessation of motivated behavior/drive
appear disconnected from environment but know what is happening
a hyperactive amygdala is seen in (2):
anxiety disorders
social phobia
