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Gross Anatomy > (UPPER ARM) Scapula + Arm Muscles: Attachments, Nerve, Movement > Flashcards

(UPPER ARM) Scapula + Arm Muscles: Attachments, Nerve, Movement Flashcards

1
Q

Pectoralis Major m.

A

A: Anterior Sternum, Medial 1/2 Clavicle, Lateral Lip of Intertubercular Sulcus
Mvmnt:Adducts and Medially rotates GH Joint, Horizontal adduction, flexion
Nerve: Lateral and Medial Pectoral Nerve

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2
Q

Pectoralis Minor m.

A

A: 3-5th Costal Ribs, Medial border of coracoid
Mvmnt: Anteriorly and inferiorly holds scapula to thoracic wall, downward rotation of scapula
Nerve: Medial Pectoral nerve

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3
Q

Subclavius m.

A

A: 1st rib and subclavian groove of clavicle
Mvmnt: anchors and depress the clavicle
Nerve: nerve of subclavius

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4
Q

Teres Major m.

A

A: Inferior angle of posterior scapula , medial lip intertubercular sulcus of humerus
Mvmnt: Adducts and medially rotates GH Joint (arm)
Nerve: Lower Scapular nerve

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5
Q

Teres Minor m.

A

A: Lateral boarder of scapula, middle to inferior facet of greater tubercle
Mvmnt: Laterally rotates and abducts GH joint (Arm)
Nerve: Axillary Nerve

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6
Q

Infraspinatus m.

A

A: Infraspinous fossa, greater tubercle of humerus
Mvmnt: Laterally rotates GH Joint (arm) acts , abducts with rotator cuff muscles
Nerve: Suprascapular nerve

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7
Q

Supraspinatus m.

A

A: Supraspinous fossa, greater tubercle
Mvmnt: Abduction of GH Joint helping middle deltoid and rotator cuff muscles
Nerve: Suprascapular Nerve

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8
Q

Subscapularis m.

A

A: Subscapular fossa, lesser tubercle of humerus
Mvmnt: medially rotates GH Joint (Arm)
Nerve: Upper + Lower Subscapular nerve

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9
Q

Deltoid m.

A

A: All Deltoid tuberosity
Anterior–>Lateral 3rd Clavicle
Middle–> acromion
Posterior–>Spine of the scapula
Mvmnt:
Anterior–> flex and medially rotates GH Joint (arm)
Middle–> abducts GH Joint (arm)
Posterior–> extends and laterally rotates GH Joint (arm)
Nerve: Axillary Nerve

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10
Q

Biceps Brachii (Long) m.

A

A: Radial tuberosity, supraglenoid tubercle
Mvmnt: Flex (HU/HR) and supinate forearm (proximal RU) Flexion of GH
Nerve: Musculocutaneous Nerve

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11
Q

Biceps Brachii (Short) m.

A

A: Radial tuberosity, coracoid process
Mvmnt: Flex forearm (HR/HU) + Supination Proximal Radioulnar
Nerve: Musculocutaneous Nerve

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12
Q

Brachialis m.

A

A: Ulna tuberosity, coronoid process, distal half of anterior humerus
Mvmnt: Flex forearm (HU/HR)
Nerve: Musculocutaneous Nerve

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13
Q

Coracobrachialis m.

A

A: Coracoid Process to middle 3rd humerus
Mvmnt: Flex and medially rotates + adducts GH Joint
Nerve: Musculocutaneous Nerve

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14
Q

Posterior Compartment
Triceps Brachii m.

A

A:
Long Head:Infraglenoid tubercle of scapula , to proximal end of olecranon of ulna and fascia of forearm
Lateral Head: Post. humerus superior to radial groove , to proximal end of olecranon of ulna and fascia of forearm
Medial Head: Post. humerus inferior to radial groove ,to proximal end of olecranon of ulna and fascia of forearm
Mvment: Extension GH Joint + extensor of forearm, long head resists dislocation of humerus (during adduction)
Innervation: Radial Nerve

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15
Q

Posterior Compartment
Anconeus m.

A

A: Lateral epicondyle of humerus, lateral surface of olecranon and superior part of posterior surface of ulna
Mvmnt: Assists triceps in extending forearm, stabilizes elbow joint
Innervation: Radial Nerve

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16
Q

Arterial Flow Review
Borders

A

-Lateral Aspect 1st RIb to Superior Pectoralis minor (AXILLARY ARTERY)
Axillary 1st Part
-Supreme Thoracic A.
-Inferior Boarder of Pectoralis Minor
Axillary 2nd Part
-Thoracoacromial A.
-Lateral Thoracic A.
-Inferior Boarder Teres Major
Axillary 3rd Part
-Subscapular A.
-Anterior Humeral Circumflex A.
-Posterior Humeral Circumflex A.
-Teres Major Muscle (BRACHIAL ARTERY)
-Profunda Brachii A. + Radial Collateral A. +Middle Collateral A.
-Superior Ulnar Collateral A.
-Inferior Ulnar Collateral A.
-SPLIT-
-Radial A. (Splits)
-Ulnar A. (Splits)
-Ulnar: Anterior ulnar recurrent
Posterior unlar recurrent
Common Interosseous
Anterior and posterior innterosseous
Radial: Radial recurrent branch
Recurrent interosseous

17
Q

Quadrangular Space

A

Boarders:
-Medially: Long Head of the Triceps Brachii
-Laterally: Humerus
-Superiorly: Teres Minor
-Inferiorly: Teres Major

Contents:
-Posterior Humeral Circumflex A.
-Axillary Nerve.
These run together and go posteriorly

18
Q

Triangular Space

A

Boarders:
-Laterally: Long head of the Triceps Brachii
-Superiorly: Teres Minor
-Inferiorly: Teres Major

Contents:
-Circumflex Scapular A.

19
Q

Triangular Interval

A

Boarders:
-Medially: Long head of Triceps Brachii
-Laterally: Lateral head of Triceps Brachii
-Superiorly: Teres Major

Contents:
-Radial Nerve
Profunda Brachii A.

20
Q

What are the articulations of the humerus?

A

1) Glenohumeral (glenoid fossa with humeral head)
2) Humeroradial (Capitulum of humerus with head of radius)
3) Humeroulnar (trochlea of humerus with trochlear notches of ulna)

21
Q

How would you differentiate 4 rotator cuff muscles? (SSIT)

A

-Subscapularis= Lesser Tubercle
-Supraspinatus= Greater Tubercle (closest to intertubercular sulcus)
-Infraspinatus= Greater Tubercle (2nd to intertubercular sulcus more lateral)
-Teres Minor Greater Tubercle (most lateral to intertubercular sulcus)

22
Q

What is the difference between teres major, latissimus dorsi, and pectoralis major on their attachment to humerus?

A

-Teres Major-Medial Sulcus (lip)
-Latissimus Dorsi- Floor of intertubercular Sulcus
-Pectoralis Major- Lateral Sulcus (lip)

23
Q

What are the motions at glenohumeral joint? (GH JT)

A

-Flexion
-Extension
-Horizontal Adduction
-Horizontal Abduction
-Internal Rotation (Medial)
-External Rotation (Lateral)
-Circumduction
-Scaption

24
Q

Serratus Anterior m.

A

A: External surfaces of lateral parts 1st-8th ribs to Anterior Surface of medial boarder of the Scapula
Mvmnt: Protracts scapula and holds it against thoracic wall , Upward rotation of scapula, depression of scapula

25
Q

Bones associated with shoulder scapula

A

Scapula, Proximal humerus, clavicle

26
Q

Movement of Scapula:
Elevation

A

Trapezius , upper
-Spinal Accessory Nerve 11 CN XI)
Levator Scapulae
Rhomboids
-Dorsal Scapular

27
Q

Movement of Scapula:
Depression

A

Latissimus Dorsi- Thoracodorsal
Trapezius, lower - (CN XI)
Serratus Anterior- Long Thoracic
Pectoralis Minor- Medial Pectoral

28
Q

Movement of Scapula:
Protraction

A

Serratus Anterior- Long Thoracic
“Pecs”-Major and minor
(fiber orientation)

29
Q

Movement of Scapula:
Retraction

A

Trapezius, middle- (CN XI)
Rhomboids- Dorsal Scapular

30
Q

Movement of Scapula:
Upward Rotation

A

Trapezius- upper+lower- (CN XI)
Serratus Anterior- Long Thoracic

31
Q

Movement of Scapula:
Downward Rotation

A

Levator Scapulae- Dorsal Scapular
Rhomboids- Dorsal Scapular
Latissimus Dorsi- Thoracodorsal
Pectoralis Minor- Medial Pectoral

32
Q

Arterial Blood Flow SUPPLY (Axillary)

A

Supreme Thoracic
-Serratus Anterior and Intercostals 1+2
Thoracoacromial
-SC,AC, Deltoid, Pec Major
Lateral Thoracic
-Serratus Anterior, Pectoralis Major, Pectoralis Minor
Subscapular
-Latissimus Dorsi, Infraspinatus,Supraspinatus
Anterior Humeral Circumflex
-GH JT, Deltoid
Posterior Humeral Circumflex
-GH JT, Deltoid, Triceps

Gross Anatomy (8 decks)

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