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Name the different joints of the thumb numbered from 1 to 3 and summarise hand grips in the table below.

Biology

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Here are the answers to parts C and D.

C) Name the different joints of the thumb numbered from 1 to 3 in the picture below.

  1. Carpometacarpal (CMC) joint
  2. Metacarpophalangeal (MCP) joint
  3. Interphalangeal (IP) joint

D) Fill in the gaps in the table below to summarise hand grips.

Precision or Power gripName of Mature gripThumb involved (yes or no)Digits involved (yes or no)Palm involved (yes or no)Real life example
PrecisionThree-jaw chuck gripYesYesNoHolding a pen
PowerCylindrical gripYesYesYesHolding a water bottle
PrecisionLateral pinchYesYesNoTurning a key in a lock
PowerSpherical gripYesYesYesHolding an apple
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