16 Jun Begin by examining muscles found in the upper limbs
Question
Question:
Procedure
1. Begin by examining muscles found in the upper limbs. First, extend your forearm so you have a clear view of your hand. What muscle is required to perform this extension? Extend your fingers out so they are straight and splayed apart. Then, retract your fingers into a tight fist. Repeat this motion several times, observing the wrist and hand muscles as the flex and relax. What muscles are used to complete this ac- tion? Record your observations in Table 2.
Note: It is helpful to palpate the area being flexed to better identify which muscles are being used.
2. Moving up the limb, extend your forearm out until it is parallel to the ground. Have a partner press down on your forearm. Flex your forearm to provide resistance as your partner pushes down. Observe the fore- arm and identify which muscles are being used. Record your observations in Table 2.
3. The partner should stop pushing down on your forearm, but keep it extended. Curl the forearm upward, creating a bend at the elbow. Observe which muscles are being used to complete this action, and record your observations in Table 2.
4. Find a heavy object, and pick it up. Keeping your arm straight, raise the object out to the side until it is parallel to the ground. What muscles does this require? Continue holding the object, drop your arm down
and rotate it back behind you. What muscles does this activate? Record your observations in Table 2.
Note: Be sure the heavy object is not too heavy before you lift it. This item should be approximately 5 – 10 pounds. This object should never be raised above your head!
5. Move down to the lower limbs, and determine what motions are needed to view the lower limb muscles in action. For example, you may want to walk, jump, sit, point your toes, etc. Engage at least seven different muscles and indicate what motion was used to engage each muscle in Table 2.
Movement
Muscle(s) Activated
Action(s) of Muscle(s)
1. Forearm Extended (Step 1)
2. Fingers Extended and Splayed (Step 1)
3. Fingers Retracted (Step 1)
4. Forearm Pressed Down Upon (Step 2)
5. Elbow Bent (Step 3)
6. Arm Raised to Side with Heavy Object (Step 4)
7. Arm Extended Back with Heavy Object (Step 4)
8. Foot extended and Raised up and down
9. Knees bent while standing
10. Lower leg extended while sitting with 5lb weight attached
11. Foot extended and moved in circular motion
12. Legs while walking
13. Lower legs while swimming
14. Knees while holding 20lb and doing squats
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