cerebral hemispheres Flashcards
what is neocortex?
thin sheet of neurons lying just until pial surface of the cerebral hemispheres
- occupies large part of the forebrain
- highly folded to increase surface area - increases computational abilities
- gyri and sulci
draw and label cortical lobes
what are the roles of the neo-cortex?
what areas of the brain are associated with these roles?
- role in making us uniquely human
- receives sensory information
- associated with primary cortical areas
- forms perception of outside world
- sensory association cortical areas
- plan and command voluntary movements
- primary and secondary motor areas
- formulation of desires, intentions, beliefs, decision making
- frontal love association cortex
draw the layered structure of the human (neo-) cortex
draw the primary sensory areas and primary motor areas of the brain
how did they work out the functions of each of fthe different cortical areas?
- examining patients who have suffered traumatic brain injuries
- modern non-invasive imagin techniques
- MRI, CT, PET scanning
what map is primary sensory cortex?
what does this mean?
somatotopic map
- not continuous
- hand and face are separated by arm/hand
draw the cortices and label with their cortical functions
What is the internal capsule?
principle fibre tracts to and from the cortex
what is cerebral dominance?
each cerebral hemisphere is associated with different set of skills
what is left hemisphere responsible for?
- manual dexterity
- mathematical skills
- analytical skills
- speech / language abilities
what is right hemisphere responsible for??
artistic skills
- spatial concepts
- pictorial recognition
- holistic and intuitive abilities
- appreciation of sound / music
- tonal recognition
what is the limbic system
describes the inter-connected brain regions that co-operate to generate the following emotions :
- fear
- aggression
- anger
- hopelessness
and ability to recognise these emotions in others
- role in sexual attraction & maternal instincts
what are the components of the limbic system?
and roles of them?
- cingulate cortex
- motivation
- error and conflict detection
- emotional response to pain
- medial region of temporal cortical lobe
- hippocampus
- memory of fear
- pleasure
- amygdala
- fear, anger
- hippocampus
- septum
- sexual arousal
- ancient olfactory cortex
- emotional response to odours
how does the limbic system connective with the autonomic nervous system
via the fornix
- fornix runs between hippocampus and mamillary body of the hypothalamus
