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Anatomy > Scapula > Flashcards

Scapula Flashcards

1
Q

Humeral Head faces what way

A

Posteriorly
Medially
Superiorly

PMS

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2
Q

Glenoid head faces what way

A

Superiorly
Anteriorly
Laterally

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3
Q

What is more superior Rhomboid major or minor?

A

Rhomboid Minor

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4
Q

Trapezius

A 
Origin
    External Occipital Protuberance
     Superior Nuchal Line
     Ligamentum Nuchia
Insertion:
     Spine of the Scapula
     Acromion Process
     Lateral 1/3 of the clavicle
Innervated: Spinal Accessory Nerve
Function:
   upper- elevates
   lower- depresses
   middle- retracts
As a whole trapezius does upward scapula rotation
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5
Q

Latissimus Dorsi

A

Origin:
Illiac Crest
Thoracolumbar Fascia
All lumbar and sacral processes
T7-T12
Inferior Angle of the scapula
Insertion:
Intertubercular groove of the humerus
Innervated: thoracodorsal nerve (middle subscapular nerve)
Function: Shoulder extension, shoulder adduction, shoulder internal rotation - can somewhat depress the scapula

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6
Q

Rhomboid Major and Rhomboid Minor

A

Origin: C7-T5
Insertion: Medial border of the scapula (aka vertibral border)
Innervated: Dorsal Scapular Nerve
Function: Scapular Retraction, elevate the scapula, scapular downward rotation
(antagonistic to trapezius for scapular rotation)

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7
Q

Levator Scapulae

A

Origin: Transverse Processes C1-C4
Insertion: Superior angle of the scapular
Innervated: Dorsal Scapular Nerve
Function: Scapular elevation, scapular downward rotation

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8
Q

Rotator Cuff Muscles

A 
SITS
Supraspinatus
Infraspinatus
Teres Teres Minor
Subscapularis
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9
Q

Supraspinatus

A

Origin: Supraspinous Fossa
Insertion: Greater Tubercle of the humerus
Innervated: Suprascapular Nerve
Function: Shoulder abduction

Starts in the supraspinous fossa and travels under the coracoacromial hood to insert onto the humerus at the greater tubercle

90% of all rotator cuff tears- suprascapular nerve entrapment is when it gets impinged between the scapular and ligament above it

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10
Q

Infraspinatus Muscle

A

Origin: Infraspinous fossa
Insertion: Greater Tubercle of the humerus
Innervated: Suprascapular Nerve
Function: External Rotation

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11
Q

Teres Minor

A

Origin: Lateral Scapular Border
Insertion: Greater Tubercle of the Humerus
Innervated: Axillary Nerve
Function: External Rotation

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12
Q

Subscapularis

A

Origin: Subscapular Fossa
Insertion: Lesser tubercle of the humerus
Innervated: Upper and Lower Subscapular Nerves
Function: Internal Rotation

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13
Q

Deltoid

A

Origin: Spine of the scapula, acromion process, and lateral 1/3 of the clavicle
Insertion: Deltoid Tuberosity
Innervated Axillary Nerve
Function: As a whole deltoid abducts
Anterior Deltoid: Flexion and internal rotation
Posterior Deltoid: Extension and External Rotation

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14
Q

Teres Major

A

Origin: Inferior Angle of the Scapula
Insertion: Intertubercle Groove of the Humerus
Innervated: Lower Subscapular Nerve
Function: Should extension, shoulder internal rotation, shoulder adduction

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15
Q

Quadranglular Space

A

Superior: Subscapularis and Terres Minor
Inferior: Teres Major
Medial: Long head of the triceps brachi
Lateral: Surgical neck of the humerus

Contains Axillary Nerve

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16
Q

Pectoralis Major

A

Origin:
Clavicular Head = clavicle
Sternocostal Head: first 6, maybe 7 costal cartilages
Abdominal Head: Interdigitates with Obliques
Insertion: Intertubercular Groove
Innervated: Lateral and Medial Pectoral Nerve
Function: Shoulder internal rotation, shoulder flexion, horizontal adduction

17
Q

What runs through the deltopectoral groove?

A

Cephaic Vein

18
Q

Serratus Anterior

A

Origin: Ribs 1-8
Insertion: Medial border of scapula (crosses over supraspinatus muscle)
Innervated: Long Thoracic Nerve
Function: Scapular protraction and upward rotation

Scapular winging is caused by damage to the long thoracic nerve or lack of strength in the serratus anterior

19
Q

Pectoralis Minor

A 
Underneath Pectoral Major
Origin: ribs 3,4,5
Insertion: coracoid process
Innervated: medial pectroal nerve
No one really knows what this does but we think it assists with protraction and downward scapular rottation

If this muscle gets tight te scapular tips forward anteriorly - this produces poor posture
(this can cause pain from increasing pressure on the ribs, increase winging, changes to the length-tension relationship of a muscle - scapular pointing further may further impinge the supraspinatus muscle

20
Q

Subclavius

A 
Under the clavicle
Origin: Inferior side of the clavicle
Insertion: rib one
Innervated: nerve to subclavius
No one knows what it does but we think it stabilizes clavicle and first rib
21
Q

Axilla

Anatomy (14 decks)

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