Evolutionary Trends in Hominins

Bipedal Locomotion
1. Jaw bone
2. Vertebral column
3. Pelvis
4. Femurs
5. Knee joint
6. Foramen Magnum
7. Legs
8. Foot
Muscle tone
1. Partial contraction of skeletal muscles
  1. e.g. erect head
Striding gait
1. only humans
2. big toe
3. transverse arch
4. longitudinal arch
Carrying angle
1. arrangement of femurs
2. broad pelvis
3. weight distribtion
  1. central axis close
4. greater stability
5. striding gait, not swaying
Cerebral cortex
1. increase in size/complexity
2. greater convolutions
  1. inc. surface area
3. inc. in cranial capacity
  1. advanced, greater frontal lobe
  2. house larger more complex brain
Dentition
1. dec. size of molars
2. canine teeth not projecting, not interlocking
3. parabolic dental arcade
Prognathism
1. reduction
2. flattened face
3. distinctive forehead
  1. gradual englargement of cranium

Resource summary

	Created by briannacoleman96 over 10 years ago