BIOL 1F90 Lecture Notes - Lecture 4: Anatomical Terms Of Motion, Palmar Grasp Reflex

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18 Sep 2014
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Use of the hands enables children to gather information about their environment in a new way. Controlling an object, use of hands, grabs objects. 3-5 months can grab an object with their hands. Visual initiation and guidance of the reach (see object/hand at same time for coordination) Tactile control of the grasp: is proximo-distal (pinky to thumb) (get more control when get closer to thumb) (grabbing, pincer grasp (pinch to pick up objects) and creeping (motorized) (8-10 months can do both) Stage 2: diagrams and combinations (draw circle and line) Stage 3: aggregates of diagrams and figures (3 or more) (few pictures) Stage 4: final stage pictorial (more complexity and precision) Stage 1: supinate grasp, involved all four fingers and thumb wrapped around the pencil in a fist. Stage 2: pronate grasp, palm down hand position (holding farther back, less control) Stage 3/final stage: the dynamic tripod, present by age 7.

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