PAPER 2- BIOPSYCH Flashcards
(12 cards)
Endogenous pacemakers?
Internal biological body clocks that allow to keep pace with changing cycles in the environment
E.g. Superchiasmatic nucleus as important endogenous pacemaker (lies in hypothalamus)
- SCN affects sleep/wake cycle
Exogenous zeitgebers?
External cues from environment that affecting body clocks.
E.g. receptor in suprachiasmatic nucleus (SCN)= sensitive to changes in light.
E.g. light + social cues
- Light has affect on sleep/wake cycle
What are the key zeitgebers?
- Light
- Social cues
Study of SIFFRE: endogenous pace makers and exogenous geitgeibers
- Entered a cave with no natural light
- Came out the cave in mid September though he entered in mid July- he came out thinking it was mid August.
- Shows how light helps maintain our 24 hour circadian rhythm
Localisation of function
Describes the theory that different areas of the brain are responsible for different specific behaviours or activities (language, hearing, memory)
Motor cortex
Responsible for general voluntary motor movements. E.g. deciding to move your arm.
- Location: frontal lobe of brain
- Damage: loss of muscle function
Somatosensory cortex
Processes input from sensory receptors in the body that sensitive to touch.
- Location: front of parietal
- Damage= loss of sensation, ignoring area of body (neglect syndrome)
Auditory cortex
Receives and processes sound info from ears
-Location: both hemispheres, top of temporal lobes
Visual cortex (occipital lobe)
Brains visual processing center, each hemispheres occipital lobe receives info from contra lateral visual field.
-Damage: partial or complete blindess
BROCAS area
Speech production
- Damage: Brocas aphasia
- Location: left hemisphere, left frontal lobe
WERNICKES area
Speech comprehension
- Damage: Wernickes aphasia
- Location: left hemisphere, top temporal lobe
