Methods of Studying Muscle Action

Methods of Studying Muscle Action - o can record intensity,...

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Methods of Studying Muscle Action Text book and drawings Conjecture and reasoning o knowing location, line of action, points of attachment, and nature of joint can see what action the muscle may cause Dissection o can be good, can also be misleading only single examples - something may be absent there is substantial variability between individuals Surface Anatomy o inspection and palpation o resist action (called reinforcing) and palpate musculature o use markers and string to identify muscle Models o small tools elastic and hinged boards Muscular stimulation o activate muscle by electrical stimulation and observe the resultant action Electromyography (EMG) o recording action potentials while muscles contract
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Unformatted text preview: o can record intensity, duration and time sequence of muscular activity during movement What information do you need to know in order to deduce the most likely joint action a muscle will cause? Points of attachment of the muscle Line of action of the muscle Relation of the line of action to the joint center o if above - will raise the bone o if below - will lower the bone o if through joint center - will compress the joint (it will not turn) The degrees of freedom and the nature of the joint Which bone(s) is free to move and which is fixed Action of neutralizers Direction of the line of gravity relative to the joint center...
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Methods of Studying Muscle Action - o can record intensity,...

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