Silly scapula you don’t need Zoloft ~ Muscles that work at the shoulder blade

Quick!

Can you name the muscles that depress the scapula?!

depressedscap

Thats right and how about for scapular elevation?

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Motion of the scapula (shoulder blade) is so important for functional use of the arm which is why these guys are so important. Indeed without proper motion of your scapula you wouldn’t be able to lift up to that top shelf, scratch your back, and give rocking  HIGH FIVES!

Quiz yourself PT students, remember all these components of these important muscles?

Scapula Elevation

Muscle

Origin

Insertion

Innervation

Action

Upper Trap

Medial 3rd of superior nuchal line; external occipital protuberance, nuchal ligament, spinous process of C7 – T12

Lateral 3rd of clavicle; acromion and spine of scapula

Spinal accessory nerve (CN XI) and C3, C4 spinal nerves

Descending par: elevate

Ascending part: depresses

Middle: Retracts scapula; descending and ascending act together to rotate glenoid cavity superiorly

Levator Scap

Posterior tubercles of transverse processes of C1 -C4

Medial border of scapula superior to root of scapular spine

Dorsal scapular (C5) and cervical (C3, C4) nerves

Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula

Scapula Depression

Muscle

Origin

Insertion

Innervation

Action

Lat Dorsi

Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs

Floor of intertubercular sulcus of humerus

Thoracodorsal nerve ( C6, C7, C8)

Extends, adducts and medially rotates

Pec Major

Clavicular Head: anterior surface of medial half of clavicle

Sternocostal head: anterior surface of sternum, superior 6 costal carti, aponeurosis of external oblique

Lateral lip of intertubercular sulcus of humerus

Lateral and medial pectoral nerves

CH: (C5, C6)

SCH: (C7,C8,T1)

Add and medially rotates humerus; draws scap anterior and inferior

CH: flexes humerus

SCH: Extends from flexed position

Pec Minor

3rd – 5th ribs near costal cartilage

Medial border and superior surface of coracoid process of scapula

Medial Pectoral N. (C8, T1)

Stabilizes scapula by drawing it inferiorly and anteriorly

Lower Trap

Medial 3rd of superior nuchal line; external occipital protuberance, nuchal ligament, spinous process of C7 – T12

Lateral 3rd of clavicle; acromion and spine of scapula

Spinal accessory nerve (CN XI) and C3, C4 spinal nerves

Descending par: elevate

Ascending part: depresses

Middle: Retracts scapula; descending and ascending act together to rotate glenoid cavity superiorly

Scapula Protraction

Muscle

Origin

Insertion

Innervation

Action

Serratus Ant

External Surface of lateral parts of 1st – 8th ribs

Anterior surface of medial border of scapula

Long thoracic N (C5, C6, C7)

Protracts scapula and holds it against thoracic wall

Pec Minor

3rd – 5th ribs near costal cartilage

Medial border and superior surface of coracoid process of scapula

Medial Pectoral N. (C8, T1)

Stabilizes scapula by drawing it inferiorly and anteriorly

Scapula Retraction

Muscle

Origin

Insertion

Innervation

Action

Trapezus

Medial 3rd of superior nuchal line; external occipital protuberance, nuchal ligament, spinous process of C7 – T12

Lateral 3rd of clavicle; acromion and spine of scapula

Spinal accessory nerve (CN XI) and C3, C4 spinal nerves

Descending par: elevate

Ascending part: depresses

Middle: Retracts scapula; descending and ascending act together to rotate glenoid cavity superiorly

Rhomboids

Minor: nuchal ligament; spinous process of C7 and T1

Major: Spinous processes of T2-T5

Minor: Smooth triangular area at medial end of scapular spine

Major: Medial border of scapula from level of spine to inferior angle

Dorsal scapular N (C4, C5)

Retract scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall

Scap Upward Rotation

Muscle

Origin

Insertion

Innervation

Action

Traps

Medial 3rd of superior nuchal line; external occipital protuberance, nuchal ligament, spinous process of C7 – T12

Lateral 3rd of clavicle; acromion and spine of scapula

Spinal accessory nerve (CN XI) and C3, C4 spinal nerves

Descending par: elevate

Ascending part: depresses

Middle: Retracts scapula; descending and ascending act together to rotate glenoid cavity superiorly

Serratus Ant

External Surface of lateral parts of 1st – 8th ribs

Anterior surface of medial border of scapula

Long thoracic N (C5, C6, C7)

Protracts scapula and holds it against thoracic wall

Scap Downward Rotation

Muscle

Origin

Insertion

Innervation

Action

Rhomboids

Minor: nuchal ligament; spinous process of C7 and T1

Major: Spinous processes of T2-T5

Minor: Smooth triangular area at medial end of scapular spine

Major: Medial border of scapula from level of spine to inferior angle

Dorsal scapular N (C4, C5)

Retract scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall

Levator Scap

Posterior tubercles of transverse processes of C1 -C4

Medial border of scapula superior to root of scapular spine

Dorsal scapular (C5) and cervical (C3, C4) nerves

Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula

Pec Minor

3rd – 5th ribs near costal cartilage

Medial border and superior surface of coracoid process of scapula

Medial Pectoral N. (C8, T1)

Stabilizes scapula by drawing it inferiorly and anteriorly

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44 thoughts on “Silly scapula you don’t need Zoloft ~ Muscles that work at the shoulder blade

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