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Hand grips p189-192

Lippert ch.13 - Hand grips pg. 189-192

QuestionAnswer
prehension grasp, a function that enables the hand to hold or manipulate objects (2 types: power & precision)
functional position of the hand wrist slightly extended, MCP & PIP joints slightly flexed, thumb in opposition {most effective for strength & precision}
power grip used for holding objects forcefully while being moved by more proximal joint muscles (often isometric)
precision grip aka: prehensile precision, used when object manipulation requires finer movement
examples of power grips holding a hammer or doorknob
examples of precision grips holding a pen or threading a needle
cylindrical grip all fingers flexed around the object, thumb wrapped around the object in opposite direction
examples of cylindrical grip holding hammer, racquet, or wheelbarrow handle, golf club, or screwdriver
spherical grip all fingers and thumb abducted around the object, fingers spread apart
examples of spherical grip holding an apple or doorknob, or picking up a glass by its top
hook grip 2nd through 5th fingers flexed around object in hook like manner, thumb not usually involved (MCP extended, PIP & DIP joints flexed)
examples of a hook grip holding the handle of a suitcase, bucket, or wagon
pad-to-pad grip MCP & PIP finger joints are flexed, thumb abducted and opposed, distal joints of both are extended
pinch grip a pad-to-pad grip that involves the thumb and 1 finger (usually index)
three-jaw-chuck a pad-to-pad grip that involves the thumb and 2 fingers (usually index & middle)
example of pinch grip holding up a coin to look at 1 side
example of a 3-jaw-chuck grip holding a pen or pencil
tip-to-tip grip aka: pincer grip, tip of thumb is up against the tip of another digit
example of tip-to-tip grip picking up small objects such as a coin or a pin
pad-to-side grip aka: lateral prehension, pad of extended thumb presses an object against the radial side of the index finger (does not require opposed thumb, just thumb adduction)
example of pad-to-side grip turning a key
side-to-side grip requires adduction of 2 fingers, thumb is not involved, week grip with little precision
example of side-to-side grip holding a cigarette or holding a pencil that is not in use
lumbrical grip aka. plate grip; MCP flexed, PIP & DIP joints extended, thumb opposes the fingers to hold the object horizontally
example of lumbrical grip holding a plate or tray hoizontal
Created by: jteich