Synergist muscle: Antagonist muscle: Abduction: Adduction: Circumduction: What i
ID: 84626 • Letter: S
Question
Synergist muscle: Antagonist muscle: Abduction: Adduction: Circumduction: What is the main muscle used to elevate the shoulders when shrugging? (a) Deltoid (b) Superior trapezius (c) Serratus anterior (d) intermediate trapezius This 'boxer's muscle' pulls the shoulders forward and along the curve of the ribs: (a) Deltoid (b) Lattisimus dorsi (c) Inferior trapezius (d) Serratus anterior A baseball pitcher throws the ball, circumducting his arm. The main muscles used for circumduction are: (a) Rotator cuffs (b) Trapezius (c) Biceps brachii (d) Rhomboidcus The "swimmer's muscle" that adducts the arm posteriorly is called the... (a) Bicep (b) Trapezius (c) Lattisimus dorsi (d) Tricep A synergist for the biceps brachii would be the.- (a) Brachialis (b) Brachio-radialis (c) Triceps brachii (d) Both A and BExplanation / Answer
1.Synergist muscle: A muscle which performs or helps to perform the same set of joint motion as the agonists.These muscles act on movable joints.
2.Antagonist muscle: A muscle that opposes the action of another.e.g.the biceps and triceps muscles
3.Abduction:In abduction, the arm moves anterolaterally away from the trunk. It takes place at right angles to the plane of flexion and extension i.e.approximately between the sagittal and coronal planes.
4.Adduction: Movement of a limb towards the midline of the body.
5.Circumduction: It is movement of distal end of a part of the body in a circle.A combination of extension,abduction,flexion and adduction in a sequence is called circumduction.
6.Ans.(b) Superior trapezius
7.Ans.(d) Serratus anterior
8.Ans.(a) Rotator cuffs
9.Ans.(c) Lattisimus dorsi
10.Ans.(d) Both A and B
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