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Anatomy > Back & Shoulder Muscles > Flashcards

Back & Shoulder Muscles Flashcards

1
Q

Trapezius

A 
Origin: vertebral column
Insertion: scapula & lateral clavicle
Action: elevation, depression, lateral rotation, and retraction of scapular
Innervation: spinal accessory
Perfusion: transverse cervical
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2
Q

Latissimus dorsi

A

Origin: vertebral column, thoracodorsal fascia, iliac crest
Insertion: anterior humerus
Action: extension, medial rotation, and adduction of arm
Innervation: thoracodorsal
Perfusion: thoracodorsal

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3
Q

Rhomboid major

A

Origin: vertebral column
Insertion: medial border of scapula, below spine
Action: medial rotation and retraction of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular

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4
Q

Rhomboid minor

A

Origin: vertebral column
Insertion: medial border of scapula, at spine
Action: medial rotation and retraction of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular

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5
Q

Levator scapulae

A 
Origin: vertebral column
Insertion: medial border of scapula, above spine
Action: elevation of scapula
Innervation: dorsal scapular
Perfusion: dorsal scapular
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6
Q

Iliocostalis

A 
Origin: iliac crest and vertebral column
Insertion: ribs
Action: extension and lateral flexion of vertebra
Innervation: dorsal rami
Perfusion: N/A
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7
Q

Longissimus

A 
Origin: transverse processes
Insertion: transverse processes
Action: extension and lateral flexion of vertebra
Innervation: dorsal rami
Perfusion: N/A
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8
Q

Spinalis

A 
Origin: spinous processes
Insertion: spinous processes
Action: extension and lateral flexion of vertebra
Innervation: dorsal rami
Perfusion: N/A
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9
Q

Deltoid

A

Origin: clavicle and scapula
Insertion: deltoid tuberosity of humerus
Action: abduction to 90, flexion/extension, and medial/lateral rotation of arm
Innervation: axillary nerve
Perfusion: posterior humeral circumflex artery

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10
Q

Supraspinatus

A 
Origin: scapula
Insertion: greater tubercle of humerus
Action: abduction to 15 of arm
Innervation: suprascapular nerve
Perfusion: suprascapular artery
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11
Q

Infraspinatus

A 
Origin: scapula
Insertion: greater tubercle of humerus
Action: lateral rotation of arm
Innervation: suprascapular nerve
Perfusion: suprascapular artery
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12
Q

Teres minor

A 
Origin: scapula
Insertion: greater tubercle of humerus
Action: lateral rotation of arm
Innervation: axillary nerve
Perfusion: posterior humeral circumflex artery
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13
Q

Teres major

A 
Origin: scapula
Insertion: lesser tubercle of humerus
Action: extension, medial rotation, and adduction of arm
Innervation: lower subscapular nerve
Perfusion: scapular circumflex artery
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14
Q

Pectoralis major

A

Origin: sternum and clavicle
Insertion: deltoid tuberosity of humerus
Action: flexion, medial rotation, and adduction of arm
Innervation: lateral and medial pectoral nerves
Perfusion: thoracoacromial artery (pectoral branch)

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15
Q

Pectoralis minor

A

Origin: ribs
Insertion: coracoid process
Action: protraction and depression of scapula
Innervation: medial pectoral nerve
Perfusion: thoracoacromial artery (pectoral branch)

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16
Q

Subscapularis

A

Origin: scapula
Insertion: lesser tuberosity of humerus
Action: medial rotation and adduction of arm
Innervation: upper and lower subscapular nerves
Perfusion: subscapular artery

17
Q

Serratus anterior

A 
Origin: ribs
Insertion: medial border of scapula
Action: abduction above 90, lateral rotation, and protraction of scapula
Innervation: long thoracic nerve
Perfusion: lateral thoracic artery
18
Q

Elevation of scapula

A

Trapezius

Levator scapulae

19
Q

Depression of scapula

A

Trapezius

Pectoralis minor

20
Q

Protraction of scapula

A

Serratus anterior

Pectoralis minor

21
Q

Retraction of scapula

A

Trapezius
Rhomboid major
Rhomboid minor

22
Q

Lateral rotation of scapula

A

Trapezius

Serratus anterior

23
Q

Medial rotation of scapula

A

Rhomboid major

Rhomboid minor

24
Q

Flexion of arm

A

Deltoid
Pectoralis major
Biceps
Coracobrachialis

25
Q

Extension of arm

A

Deltoid
Latissimus dorsi
Teres major
Triceps

26
Q

Abduction

A

Supraspinatus

Deltoid

27
Q

Adduction

A 
Deltoid
Pectoralis major
Subscapularis
Latissimus dorsi
Teres major
Triceps
28
Q

Medial rotation

A 
Deltoid
Pectoralis major
Latissimus dorsi
Teres major
Subscapularis
29
Q

Lateral rotation

A

Deltoid
Infraspinatus
Teres minor

30
Q

What are the contents of the quadrangular space?

A

Axillary nerve

Posterior humeral circumflex artery & vein

31
Q

What are the contents of the triangular space?

A

Scapular circumflex artery

32
Q

What are the contents of the triangular interval?

A

Radial nerve

Deep brachial artery & vein

33
Q

What are the contents of the cubital fossa?

A

Lateral antebrachial cutaneous nerve
Biceps tendon
Brachial artery
Median nerve

Anatomy (11 decks)

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