1. Upper Extremity – Bones, Joints and Movement
Quiz 10 – part C Myology
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2. Myology – lever systems
movement usually requires a lever system – three types: 1. 2. 3.
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3. Myology – lever systems
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4. Myology – lever systems
do muscles push, pull, or push and pull?
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5. Myology – lever systems
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6. Myology – lever systems
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7. Myology – lever systems
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8. Myology – lever systems
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9. Myology – lever systems
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10. Myology – lever systems
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11. Myology – lever systems
so which lever is most common in the body?
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Myology – movement
requirements for movement: 1.
how do we stretch muscles?
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Myology – movement 2. 3.
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14. Myology – lever systems
muscle
bone
will it move?
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15. Myology – lever systems
will it move?
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16. Myology – lever systems
will it move?
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Myology – movement
does the diarthrosis have to involve living bones?
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Myology – movement
tractor with front loader:
tractor weighs 10,000 pounds
rock weighs 100 pounds
front scoop can lift 20,000 pounds
what moves?
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Myology – movement
same tractor:
try to lift school
what moves?
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Myology – movement
muscles can be named for their relationship to other muscles:
muscles with opposite actions – flexor of a joint is an antagonist to an extensor of that joint – e.g. brachialis and biceps brachii are antagonists to the triceps brachii
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Myology – movement
a muscle that provides most of the force is the prime mover (agonist) for that joint – e.g. deltoid
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Myology – movement
a muscle that aids a prime mover in a motion or prevents undesired motions by preventing movement of an intermediate joint is a synergist – e.g. the anconeus is a synergist of the triceps brachii in extension of the elbow (forearm)
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Myology – movement
a muscle that stabilizes one or more bones so that it (they) can act as a platform for other motion is a fixator e.g. the trapezius stabilizes the clavicle and scapula so that muscles from those bones can move the arm
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Myology – movement
a muscle that can be used to prevent an undesired motion of another muscle is a neutralizer – e.g. the pronator teres is a neutralizer for the biceps brachii – it allows flexion of the elbow but cancels out supination
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Myology – movement
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Myology – movement
if muscles contract but there is no movement?
if muscles contract and there is movement?
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Myology – movement
when we move, what kind of contraction?
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Myology – movement
what if we have a muscle that crosses two joints – which one moves?
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Myology – movement
what movement?
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Myology – movement
what movement?
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Myology – movement
what movement?
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Myology – movement
what movement?
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Myology – movement
what movement?
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Myology – movement
what movement?
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Myology – movement
what movement?
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Myology – movement
when we do a pushup from the ground what muscle is causing extension of the elbow (forearm)?
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Myology – movement
when we do a pushup letting ourselves to the ground what muscle is active?
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Myology – movement
four functions of muscles: 1. 2.
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Myology – movement 3. 4.
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Myology – movement
what muscle characteristic allows muscles to do those things?
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Myology – movement
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Myology – movement
part C of quiz 10 – myology, joints and movement, and bones of the upper limb, their girdle, landmarks, and joints
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