- Emotional behaviour and motivational drive is controlled by Limbic system(♡imagine big company)
- Limbic system consist of 6 subcortical limbic areas surrounded b 5 cortical limbic areas(♡company has 6 junior employees and 5 senior employees)
- 6 subcortical limbic areas are -
1) amygdala
2) septal area
3) anterior nuclei thalamus
4) peri olfactory areas
5) portions of basal ganglia
6) hippocampal areas
- 5 surrounding cortical limbic areas are -
1)cingulate area
2)orbitofrontal area
3)parahippocampal gyrus
4)uncun
5)sub callosul gyrus
- Papez circuit (♡processing machine) :
¤ it consist of cingulate gyrus(limbic system)-->parahippocampal gyrus(hypothalamus)-->mamillary body(thalamus)-->amygdala(limbic system)
¤ emotions are filtered and presented to papez circuit for processing
- Limbic system connects to brainstem by medial forebrain bundle and short fibres in reticular area.
- Medial forebrain bundle consist of fibres from septal area and orbitofrontal area passing through middle of hypothalamus and going to brainstem
Emotions :
- Sexual desire : controlled in most anterior and posterior part of hypothalamus
- Fear : hypothalamus and amygdala
- Anxiety : anterior most part of temporal lobes
- Abnormal placidity(calm) : loss of amygdala
- Outrage/violent : loss of neocortex,ventromedial hypothalamic nuclei,septal area
