studies bio approach Flashcards
fMRI and MRI
Draganski 2004
Sharot et al 2007
part of the brain affected draganski
mid-temporal area of both hemisperes, associated with visual memory.
Draganski limitiation
internal validity - most study conducted at home.
limitation of sharot et al 2007
artificial
limitations of fMRI
expensive, time consuming, little samples, correlational, wierd environment (simultaneous reaction?)
LOF studies
Sharot et al 2007
McGaugh & Cahill 1977
theory against lof
Equopotentiality
Principle of mass action - memory ability is distributed in the whole brain and the lack of it is proportional to the brain that is injured.
Relative localisation - weak localisaiton. Several areas responsible for a function but with a dominant one.
Neuroplasticity studies
Draganski 2004
Magurie 2000
Neural networks
when a function is repeated, a group of neurons will form an interconnection by synapses in order to carry it out.
Neural prunning
opposite. When a function is no longer carried out, extra neurons and synaptic connections will be eliminated.
Neurotransmitter study
Capi et al 2003 - trauma and depression gene mutations 5-HTT
Cases et al 1995 - mice and agression
5-HTT
seretonin transporter gene, involved in the reuptake of seretonin in the synapse.
5HTT theory states that in a stressful environment , the gene will be expressed, leading to depression.
MAOA
monoamine oxidase A - breaks down seretonin (an enzyme)
Cases et al 1995 strenght
experimental study - cause and effect relationship established.
Hormones studies
McGaugh & Cahill 1977
Pitmal et al 2002 - PTSD propanolol beta blocker.
Argument for hormones
coordinate physiology and behaviour of individuals by regulating, integrating and controlling bodily functions (such as mood and metabolsim).
Pheromones studies
Zhout et al 2014
Harot et al 2017
AND
androstadienone - steroid found in men’s semen and sweat.
limitations of pheromones
400 body odours receptors - human sense of smell is complex, each with genetic variation. We do not know what to look for.
Not all body odours made by secretion, some are bacteira mixed with secretion such as sweat. 20% do not have this.
Culture plays a big role (in perception of smell and other things).
