- Created by: Francesca C
- Created on: 02-10-18 14:01
- Darwin's theory of natural selection.
- Only small proportion of each gen survives to reproduce.
- Offspring not identical to parents - each gen degree of variation, each variation heritable (can be passed on through genes).
- Each gen different to gain strength from ancestors to survive and reproduce.
- Characteristics give animals greater chance of survival and reproduction - adaptive
- Natural selection - characteristic survived and passed down - adaptive and must have given animal survival advantage.
How is altruism adaptive?
- Inherited, adaptive trait. Saving offspring/relative enhances survival of individuals gene pool.
- Adaptive due to understanding how to save offspring as our environment changes e.g. third world countries vs. first world countries.
- If altruism is present and largely at play in a child's development their offspring are more likely to survive, if a child is in care and does not receive much altruistic care when young they are less likely to survive natural selection.
- Greater chances of survival as they are cared for by their mother.
*In the past humans may have had a fear of snakes and spiders as they may have been deadly and a potential threat, innate knowledge/phobia to avoid them to survive may be a trait that has lingered around from our ancestors.
To understand the functions of the brain we must understand the environment in which the brain evolved. Humans evolving 2 million - 100,000 years ago.
Enviornment of evolutionary adaptiveness (EEA).
Humans have adapted from the enviornment our ancestors faced.
Localisation of Brain Function:
- 2 halves of the brain are called hemispheres.
- There are roughly 100 billion neurons in the brain and spinal cord.
- Cerebral cortex divided into 4 regions.
- Frontal lobe - thinking and creativity - linked to personality.
- Pariateal lobe - receives sensory information - touch, temp, pain etc.
- Temporal lobe - much of memory processing, processing auditory info.
- Occipital lobe - visual processing, receives info direct from eyes.
- Cerebral cortex- area responsible for higher order cognitive functions.
- Left hemisphere posterior portion of frontal lobe responsible for speech production - Broca's area.
- Posterior portion of left temporal lobe responsible for understanding language…