Occipital Lobe
what is the function of the occipital lobe
- perception of sight
where does the primary somatosensory cortex occupy?
post-central gyrus
- smell
- hearing
- language
- memory*
- emotions*
- object recognition
what are the 3 divisions of the frontal lobe?
- Primary motor cortex
- Pre-motor area
- Pre-frontal area
What visual processing is the unimodal association responsible for?
- processing movement
- object identification & recognition
where does sensory input come from?
Name 4 for the full point
- skin
- muscles
- tendons
- joints
why does removing one cortex not lead to complete hearing loss?
L auditory cortex receives sound from L&R ears
R auditory cortex receives sound from L&R ears
what does injury to the primary motor cortex result in?
Bonus: why?
Upper motor neuron injury
(there is a somatotopic representation of body parts on the primary motor cortex)
what does damage to the 'where' visual pathway lead to?
- late motor responses to moving targets
- inaccurate reaching movements
why does RHS brain injury cause LHS neglect?
- L parietal lobe attends to R-hemispace
- R parietal lobe attends to both L and R hemispace.
Damage to Wernicke's and Broca's Areas lead to what?
Wernicke's area - receptive aphasia
Broca's area - expressive aphasia
What are the functions of the different divisions of the frontal lobe
primary motor cortex - movement execution
premotor cortex - planning & programming of movements
prefrontal cortex - organisation of intellectual + emotional context & control of intention of movement
Difference between Prosopagnosia and Apperceptive Agnosia?
Bonus: damage to which area of the ventral pathway causes this?
Prosopagnosia - inability to recognise familiar faces
Apperceptive Agnosia - can detect appearance of presented items but have difficulty perceiving their shape and cannot recognise/name them
Bonus: Brodmann's Area 19
which limbic structures are involved in the multimodal association areas? (200)
how do they contribute to perception? (200)
- amygdala (emotional response)
- hippocampus (stored memories)
T/F
Loss of sense of smell (anosmia) is also linked to cerebral cortex damage
Anosmia is linked to olfactory sensory machine damage rather than cerebral cortex damage
symptoms of frontal lobe dementia (name at least 3)
- lose empathy
- lose inhibitions
- become aggressive
- easily distracted
- display compulsive rituals
What is the name of the area that 'decides whether the subject will/won't reach out to the moving object'?
Brodmann's 46
Dorsolateral prefrontal cortex
Frontal Lobe Question :)
What does a unilateral lesion of the Supplementary area lead to?
Akinesia (inability to initiate movement) of the contralateral arm and leg
What connects Wernicke's and Broca's areas?
White matter tract called Arcuate Fasciculus
on which areas of surface 6 do the pre-motor and supplementary areas lie?
premotor - lateral surface of area 6
supplementary - medial surface of area 6