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Gross Anatomy > Muscles of the Upper Limb > Flashcards

Muscles of the Upper Limb Flashcards

0
Q

Insertion of Pectoralis Major

A

Lateral Lip of Intertubercular Sulcus of Humerus

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1
Q

Origin of Pectoralis Major

A

Clavicular Head: Anterior Surface of Medial Half of the Clavicle

Sternalcostal Head: Anterior Surface of Sternum, superior six costal cartilages, aponeurosis of external oblique

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2
Q

Innervation of Pectoralis Major

A

Lateral and medial pectoral nerves, clavicular head (C5,C6) sternocostal head (C7, C8, T1)

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3
Q

Action of Pectoralis Major

A

Adduct and medially rotate shoulder joint, draws scapula anteriorly and inferiorly

Acting Alone, clavicular head flexes shoulder joint and sternocostal head extends it from the flexed position

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4
Q

Origin of the Pectoralis Minor

A

3rd-5th ribs near their costal cartilages

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5
Q

Insertion of the Pectoralis Minor

A

Medial Border and Superior Surface of Coracoid Process of Scapula

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6
Q

Innervation of Pectoralis Minor

A

Medial Pectoral Nerve (C8,T1)

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7
Q

Action of Pectoralis Minor

A

Stabilizes Scapula by drawing inferiorly and anteriorly against thoracic wall

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8
Q

Origin of the Subclavius

A

Junction of 1st Rib of Costal Cartilage

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9
Q

Insertion of Subclavius

A

Inferior Surface of middle third of clavicle

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10
Q

Innervation of Subclavius

A

Subclavian Nerve (C5,C6)

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11
Q

Action of Subclavius

A

Anchors and depresses clavicle

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12
Q

Origin of Serratus Anterior

A

External surfaces of lateral parts of 1st-8th Ribs

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13
Q

Insertion of Serratus Anterior

A

Anterior Surface of Medial Border of Scapula

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14
Q

Innervation of Serratus Anterior

A

Long Thoracic Nerve (C5, C6, C7)

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15
Q

Action of Serratus Anterior

A

Protracts Scapula and hold against thoracic wall; rotates scapula

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16
Q

Origin of Deltoid

A

Lateral third of Clavicle; acromion and spine of scapula

17
Q

Insertion of Deltoid

A

Deltoid tuberosity of humerus

18
Q

Innervation of Deltoid

A

Axillary Nerve (C5, C6)

19
Q

Action of Deltoid

A

Clavicular (anterior) part flexes and medially rotates shoulder joint; acromial (middle) part abducts shoulder joint; spinal (posterior) part extends and laterally rotates shoulder joint

20
Q

Origin of Supraspinatus

A

Supraspinous fossa of Scapula

21
Q

Insertion of Supraspinatus

A

Superior facet of greater tubercle of humerus

22
Q

Innvervation of Supraspinatus

A

Suprascapular Nerve (C4, C5, C6)

23
Q

Action of Suprapspinatus

A

Initiates and assists deltoid in abduction of shoulder joint and assists with the other rotator cuff muscles

24
Q

Origin of Infraspinatus

A

Infraspinous fossa of Scapula

25
Q

Insertion of Infraspinatus

A

Middle Facet of greater tubercle of humerus

26
Q

Innervation of Infraspinatus

A

Suprascapular Nerve (C5, C6)

27
Q

Action of Infraspinatus

A

Laterally rotate shoulder joint; help hold humeral head in glenoid cavity of scapula

28
Q

Origin of Teres Minor

A

Middle part of lateral border of scapula

29
Q

Insertion of Teres Minor

A

Inferior facet of greater tubercle of humerus

30
Q

Innervation of Teres Minor

A

Axillary Nerve (C5, C6)

31
Q

Action of Teres Minor

A

Laterally rotates shoulder joint; hold humeral head in glenoid cavity of scapula

32
Q

Origin of Teres Major

A

Inferior Part of Lateral Border of Scapula and posterior surface of inferior angle of scapula

33
Q

Insertion of Teres Major

A

Medial Lip of intertubercular sulcus of humerus

34
Q

Innervation of Teres Major

A

Lower Subscapular Nerve (C5, C6)

35
Q

Action of Teres Major

A

Adducts and medially rotates shoulder joint

36
Q

Origin of Subscapularis

A

Subscapular fossa (anterior surface of scapula)

37
Q

Insertion of Subscapularis

A

Lesser Tubercle of Humerus

38
Q

Innervation of Subscapularis

A

Upper and lower subscapular nerves (C5, C6, C7)

39
Q

Action of Subscapularis

A

Medially Rotates and adducts shoulder joint; helps hold humeral head in glenoid cavity

Gross Anatomy (3 decks)

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