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Anatomy final exam questions > Shoulder complex muscles > Flashcards

Shoulder complex muscles Flashcards

1
Q

Muscles are stimulated to contract by somatic ______ nerves that carry _____ in form of nerve _____ from the brain or _____ cord to the skeletal muscles

A

somatic motor nerves that carry signals in form of nerve impulses from the brain or spinal cord to the skeletal muscles.

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2
Q

Which are the scapulothoracic joint movements?

A 
Retraction (adduction) 
Protraction (abduction)
Elevation
Depression
Upward rotation
Downward rotation
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3
Q

Origin, insertion, innervation and movement of the TRAPEZIUS muscle

A 
-Origin: 
>superior nuchal line
>external occipital protuberance
>ligamentum nuchae
>spinous process of vertebrae C7-T12

-Insertion:
>lateral third of the clavicle
>medial aspect of the acromion
>spine of the scapula

-Nerve:
>accessory nerve (CN11)
>anterior rami C3-4

-Mov:
>upper: elevation and upward rotation
>middle: retraction
>lower: depression and upward rotation

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4
Q

Origin, insertion, innervation and movement of the RHOMBOID MAJOR muscle

A

-Origin:
>spinous process of T2-T5

-Insertion:
>medial border of scapula from inferior angle to the spine)

-Nerve:
>dorsal scapular nerve

-Mov:
>elevation of scapula
>retraction of scapula
>downward rotation of sc

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5
Q

Origin, insertion, innervation and movement of the RHOMBOID MINOR muscle

A

-Origin:
>spinous processes of C7-T1
>inferior ligamentum nuchae

-Insertion:
>medial border of scapula at the spine

-Nerve:
>dorsal scapular nerve

-Mov:
>retraction
>elevation
>downward rotation

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6
Q

Origin, insertion, innervation and movement of the LEVATOR SCAPULAE muscle

A

-Origin:
>transverse processes of C1-C4

-Insertion:
>medial border of scapula from superior angle to spine of scapula

-Nerve:
>dorsal scapular nerve

-Mov:
>elevation of the scapula
>downward rotation of scapula

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7
Q

Origin, insertion, innervation and movement of the PECTORALIS MINOR muscle

A

-Origin:
>anterior surface of ribs 2-5

-Insertion:
>coracoid process of scapula

-Nerve:
>medial pectoral nerve

-Mov:
>protraction of scapula

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8
Q

Origin, insertion, innervation and movement of the SERRATUS ANTERIOR muscle

A

-Origin:
>laterally on the upper 9 ribs

-Insertion:
>anterior surface of medial border of scapula

-Nerve:
>long thoracic nerve

-Mov:
>protraction
>assists upward rotation

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9
Q

Which are the glenohumeral joint movements

A
  • flexion
  • extension
  • adduction
  • abduction
  • circumduction
  • internal rotation
  • external rotation
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10
Q

Origin, insertion, innervation and movement of the DELTOID muscle

A

-Origin:
>lateral third of the clabicel
>acromion process
>spine of the scapula

-Insertion:
>deltoid process of the humerus

-Nerve:
>axillary nerve

-Mov:
>abduction
>anterior fibres: flexion, some internal rotation
>posterior fibres: extension, some external rotation

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11
Q

Origin, insertion, innervation and movement of the SUPRASPINATUS muscle

A

-Origin:
>medial 2/3 of the supra-spinous fossa

-Insertion:
>greater tuberosity of the humerus (superior aspect)

-Nerve:
>supra-scapular nerve

-Mov:
>abduction
>rotator cuff stability

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12
Q

Origin, insertion, innervation and movement of the PECTORALIS MAJOR muscle

A

-Origin:
>clavicular head: anterior surface of medial clavicle
>sternocostal head: anterior surface of sternum, costal cartilages ribs 1-6, aponeurosis of external oblique muscle
-Insertion:
>lateral lip of the inter tubercular groove

-Nerve:
>medial and lateral pectoral nerve

-Mov:
>adduction
>internal rotation
>flexion(clavicular fibres)
>extension (sternocostal fibres)
>assists protraction (scapular movement)
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13
Q

Origin, insertion, innervation and movement of the BICEPS BRACHII muscle

A

-Origin:
>long head- supraglenoid tubercle of scapula
>short head-coracoid process of scapula

-Insertion:
>radial tuberosity of the radius

-Nerve:
>muscolocutaneus nerve

-Mov:
>shoulder flexion
>elbow flexion
>forearm supination

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14
Q

Origin, insertion, innervation and movement of the CORACOBRACHIALIS muscle

A

-Origin:
>coracoid process of the scapula

-Insertion:
>anteromedial shaft on the humerus

-Nerve:
>muscolocutaneus nerve

-Mov:
>shoulder flexion
>shoulder adduction

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15
Q

Origin, insertion, innervation and movement of the LATISSIMUS DORSI muscle

A 
-Origin: 
>posterior iliac crests
>spinous processes of T7-T12
>thoracolumbar fascia
>9-12 rib

-Insertion:
>floor of the intertubercular groove of humerus

-Nerve:
>thoracodorsal nerve

-Mov:
>shoulder extension
>shoulder internal rotation
>shoulder adduction

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16
Q

Origin, insertion, innervation and movement of the TERES MAJOR muscle

A

-Origin:
>lateral border and inferior angle of scapula

-Insertion:
> medial lip of intertubercular groove of humerus

-Nerve:
>lower subscapular nerve

-Mov:
>shoulder internal rotation
>shoulder extension
>shoulder adduction

17
Q

Origin, insertion, innervation and movement of the TRICEPS BRACHII muscle

A

-Origin:
>long head: infraglenoid tubercle of scapula
>lateral head: posterior humerus superior to radial groove
>medial head: posterior humerus inferiorto radial groove

-Insertion:
>olecranon process of the ulna

-Nerve:
>radial nerve

-Mov:
>elbow extension
>shoulder extension (long head)
>shoulder adduction (long head)

18
Q

Origin, insertion, innervation and movement of the SUBSCAPULARIS muscle

A

-Origin:
>subscapular fossa of scapula

-Insertion:
>lesser tuberosity of humerus

-Nerve:
>upper and lower subscapular nerve

-Mov:
>shoulder internal rotation

19
Q

Origin, insertion, innervation and movement of the INFRASPINATUS muscle

A

-Origin:
>medial 2/3 of the infraspinous fossa

-Insertion:
>posteriorly on the greater tuberosity of humerus

-Nerve:
>subscapularis nerve

-Mov:
>shoulder external rotation

20
Q

Origin, insertion, innervation and movement of the TERES MINOR muscle

A

-Origin:
>lateral border of the scapula

-Insertion:
>posteriorly on the greater tuberosity of humerus

-Nerve:
>axillary nerve

-Mov:
>shoulder external rotation

Anatomy final exam questions (6 decks)

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