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Unformatted text preview: 1 Three main types of movements 1. Voluntary movements ‣ purposeful and goal directed ‣ usually learned and improved with practice (i.e. require less conscious effort) ‣ they can be initiated in response to particular sensory experience or at will 2. Reflex movements ‣ e.g. knee jerk, coughing, withdrawal from hot object, eyeblink from air puff ‣ simplest behaviors; under the least amount of voluntary control (involuntary) ‣ rapid ‣ usually controlled in a graded way by eliciting stimulus 3. Rhythmic motor patterns ‣ e.g. walking, running, chewing ‣ combine elements of reflex and voluntary control ‣ typically, only the initation and termination are controlled voluntarily. once initiated these types of movements proceed almost automatically in a reflex-like fashion 2 The motor system must take into account several tasks in orchestrating even simple movements •the motor system must take into account the mechanical properties of the muscles and joints •contracting and relaxing muscles to move the limbs around the joints...
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- Fall '07
- Corticospinal tract, motor cortical areas, e.g. tilt body, e.g. tilt head