Please enable JavaScript.
Coggle requires JavaScript to display documents.
Why The Big Brain?, Selective pressures, Selective Pressures, Causes of…
Why The Big Brain?
Selective pressures
Limited Resource Access
Promoted
Arboreal Environment
Birth Canal Diameter Limits Prenatal Brain Growth / Development
Promotes -->
Selective Pressures
Increased Predation
Expansion of Savannah
Causes of Brain Evolutionary Pulses
Climatic Pressure
Expansion of Savannah
Increased Predative Pressure
Complex Sociality
Enhanced Communicative Ability
Promotes
Trading
<-- Promotes
Promotes
Increased Neuronal Density
Parietal Cortex Epansion
memory, information integration, coordination (tool usage)
Neocortical Selection
Promotes
Selection Against Aggression
Behavioural Vocalizations
Interbreeding
Cultural Exchange & Admixture
Promotes
Social Intelligence
Promotes
Social Brain Hypothesis
Promoted
Solving Ecological Problems Socially
Social Brain Hypothesis
Promoted
Climate Pulses Create Environmental Unpredictability
Variability Selection Hypothesis
Promoted
Promoted
Promoted
Increased Meat Consumption
Promoted
Alleviates Energetic Constraint
Selective Pressures
Migration
Promotes
Climate Pulses
Promoted
START HERE ( at the brain stem :) )
Early Primates
Significant Neonatal Brain Growth & Development
Post Birth Brain Development = 50% BMR
Significant Parental Investment Per Offspring
Constraint - Fewer Offspring Per Parent
Arboreality
Selected For
Development of Visual Systems
Retinotopy
Visual Grasp Reflex
Integration of Higher Order Cortical Regions
Binocular Vision & Depth Perception
Posterior Parietal Cortex
Blobs (Maybe Colour Vision)
Perception of Head & Body Centered Receptive Field Coordinates
Integration of Higher Order Cortical Regions
Frontal Cortex
Dorsolateral Prefrontal Cortex
Attention
Working Memory
Programming of Novel Behaviors
Frontal Eye Fields
Mirror Neurons
Integration of Higher Order Cortical Regions
Mirror Neurons
Observational Learning
Imitation
2 more items...
Promoted
1 more item...
Sensory-Motor Systems
Promotes -->
Limbic Cortex
Posterior Cingulate Cortex
Spatial Attention & Memory
Integration of Higher Order Cortical Regions
Mental Navigation
Parahippocampus
Long Term Memory
Integration of Higher Order Cortical Regions
Thalamus
Dorsal Pulvinar Networks
Higher Order Visual, Auditory & Somatosensory Areas
Integration of Higher Order Cortical Regions
Greater Resource Access Promoted -->
Precocial, Large Brained Small Mammal
Brain & Body Size Scaling
Greater Neocortical Volume
Average Brain Size Doubles
Higher Neuronal density
Brain & Body Scalling
Theory of Mind
Understanding of True & False Beliefs
Self Recognition
1 more item...
Promoted-->
Greater Group Size
5 more items...
Promoted
Tactical Deception
Promoted
Increased Terrestriality
Increased terrestrially
Increased Terrestriality
Promoted
Constrained
Scheherazade Intelligence Hypothesis
Machiavellian Intelligence Hypothesis
Selective Pressure
Low Cerebellar & Neocortical Development
Early Primates
Simians
Great Apes
Hominins
High Cereballar & Neocortical Development
Teal = LIFTED CONSTRAINT
Red = CONSTRAINT
Grey = Hypothesis Supported Developments
Domestication of Fire
Similar Tools Used Across Separate Bands Suggests Trade & Cultural Admixture