Term
| Why do we care about hominin locomotion? |
|
Definition
we can reconstruct locomotion easily based on bones.
• Diet and locomotion are important in understanding the ecology of our ancestors. The way it distinguishes us. No other two legged primates. |
|
|
Term
| What does it take to walk on two legs? |
|
Definition
• Heal strike (heel)
• mid stance (flat foot)
• recovery (toe) |
|
|
Term
|
Definition
| • No body found with him, but they saw that the brain stem was positioned upright. This means he was bipedal |
|
|
Term
| Australopithecus africanus |
|
Definition
• Flat broad pelvis, iliac blade human like
• Head and neck of femur shows valgus kneed |
|
|
Term
| The argument about Lucy-- |
|
Definition
Facultative biped
• Stoneybrook vs. kent state
o Had to walk on two legs (plavkin)
o Or option two: adapted to walk onto two legs (ungar) |
|
|
Term
|
Definition
• Had heel strike
• Had an arch
• Big toe inline
• Long foot and toes
• Fast gait because footprints close to one another |
|
|
Term
| The argument about afarensis (Lucy) cont. |
|
Definition
berkeley says they were biped fulltime because of broad illiac blades, large femoral head, long curved toes for large foot muscles.
Stoneybrook says lucy wasn't bipedal fulltime. says she was also in trees |
|
|
Term
|
Definition
| bones remodel based on stresses applied to them |
|
|
Term
| Aus africanus (conclusion) about locomotion |
|
Definition
• Mosaic adaptation
o Yes it was bipedal, but it lived in the trees more than being bipedal.
o Better than chimps on the ground--though not as good as humans on ground. |
|
|
