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Skeletal Muscles, anatomy lab 2021

Terms in this set (32)

adduction: bringing limbs of other body parts closer to the midline of the body.
abduction: moving body parts further away from the midline of the body.
define adduction and abduction
elevation: refers to movement in a superior direction eg shoulder shrug
depression:refers to movement in an inferior direction.
define elevation and depression
Medial rotation is a rotational movement towards the midline
Lateral rotation is a rotating movement away from the midline
Medial and Lateral Rotation
Pronation: hand rotating from dorsum of hand to expose the palm
Supination: hand rotating from palm of hand to expose dorsum of hand
(in anatomic postion)
Pronation and Supination
protraction: extending a body part away from the body. eg extending neck forward
retraction: retracting body part toward the body. eg bringing the neck back making a double chin.
Protraction and Retraction
Trapezius
superior fibers: elevate and upwardly rotate scapula, elevate clavicle, extend head
middle fibers: adduct scapula
inferior fibers: depress scapula
name the muscle and its action(s).
What are the actions of the superior, middle and inferior fibers of this muscle?
levator scapulae
action: elevates scapula
name the muscle and its action
Rhomboid major
action: adducts, elevates and stabilizes scapula. also downwardly rotates scapula
name the muscle and its action
Rhomboid minor
action: adducts, elevates, stabilizes and downwardly rotates scapula.
name the muscle and its action
Surratus anterior
action: abducts and stabilizes scapula
name the muscle and its action
pectoralis minor
action: abducts and depresses scapula
name the muscle and its action
supraspinatus
action: abducts arm at shoulder joint
proximal: supraspinatus fossa of scapula
distal: greater tubercle of humerus
name the muscle, action, proximal and distal attachment
infraspinatus
action: laterally rotates arm at shoulder joint
proximal: infraspinuos fossa of sccapula
distal: the greater tubercle of humerus
name the muscle, action, proximal and distal attachment
teres minor
action: laterally rotates and weakly adducts arm at shoulder joint
proximal: lateral border of scapula
distal" the greater tubercle of humerus
name the muscle, action, proximal and distal attachment
subscapularis
action: medially rotates arm at shoulder joint
proximal: subscapular fossa of scapula
distal: lesser tubercle of the humerus
name the muscle, action, proximal and distal attachment
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