Lecture 13: Grasping Flashcards
What are they 4 types of grips?
1) Scissor
2) Hook
3) Precision
4) Power
What does the “Power Grip” do?
- Active squeezing of the palm against other fingers
- Keeps hold of the object
What does the “Precision Grip” do?
- Involves the thumb and one or more other fingers
- Palm is not active
- Hold a part of an object more specifically
What is the “Universal Joint?”
Saddle, between the first metacarpal and trapezium
Hinge joints only permit _____ and______
Flexion; Extension
The ability to make _____ ______ was important event in human evolution
Stone Tools
Oldowan Tools:
_____ are good for _______
Flakes; Butchering
Oldowan Tools:
____ smashes against _____ to produces flakes
Core; Hammerstone
Making Stone Tools involved using this grip:
Power Grip
Using Stone Tools involved using these grips:
Power and Precision
Chimps were able to make stone tool as well as humans.
T/F
False, They were not made as well
Comparative Anatomy:
Apes hands are a compromise between ______ and _____
Locomotion
Manipulation
What are the 3 differences between Humans and Chimps in regards to stone tool making?
1) Force in Precision Grip
2) Accommodate the shape of the tool
3) Constantly adjust the orientation of the core
Ape vs Mankind:
Out of all the primates, whose thumbs are the longest
Humans
What are “Broad Ungual Tufts?”
Support large pads, like fingertips, to distribute pressure
