Lecture 1 (8/12) - Intro/Superficial Back

What superficial muscles constitute the borders of the triangle of ausculation?

Latissimus Dorsi,
Rhomboid Major,
Trapezius

What nerves innervate the Serratus Posterior Superior?

Ventral rami of upper thoracic nerves (T2-T5)

What nerves innervate the Serratus Posterior Inferior?

Ventral rami of lower thoracic nerves (T9-T12)

What muscles make up the erector spinae?

Iliocostalis, Longissimus, Spinalis
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What is the origin of the Trapezius?

Superior nuchal line,
External occipital protuberance,
Ligamentum nuchae,
SP C7-T12

What is the origin of the Serratus Posterior Superior?

Lower ligamentum nuchae,
SP C7-T3

What is the origin of the Serratus Posterior Inferior?

SP T11-L3 (sometimes terminates at L2)

What is the origin of the Rhomboid Minor?

Lower ligamentum nuchae,
SP C7-T1

What is the origin of the Rhomboid Major?

SP T2-T5

What is the origin of the Levator Scapulae?

Transverse processes of C1-C4

What is the origin of the Latissimus Dorsi?

SP T7-L5,
Ribs 10-12,
Thoracolumbar fascia,
Iliac crest,
Sacrum

What is the insertion of the Trapezius?

Lateral 1/3rd of clavicle/acromion,
Spine of scapula

What is the insertion of the Serratus Posterior Superior?

Superior border of ribs 2-5, lateral to their angles

What is the insertion of the Serratus Posterior Inferior?

Inferior border of ribs 9-12, lateral to their angles

What is the insertion of the Levator Scapulae?

Superior angle of scapula

What is the insertion of the Latissimus Dorsi?

Floor of intertubercular sulcus of humerus

What is the insertion for the Rhomboid Minor?

Medial border of scapula parallel to the spine

What is the insertion for the Rhomboid Major?

Medial border of scapula between spine and inferior angle

What is the action of the Trapezius?

Rotates, Elevates (Superior part), Retracts (Middle part), Depresses (inferior part), the scapula

What is the action of the Serratus Posterior Superior?

Elevates ribs 2-5

What is the action of the Serratus Posterior Inferior?

Depresses ribs 9-12

What is the action of the rhomboids?

Retracts and rotates the scapula to tilt glenoid cavity inferiorly

What is the action of the Latissimus Dorsi?

Extends, adducts, and medially rotates humerus
Lats = extend, pecs = flex

What arteries supply the Serratus Posterior Inferior?

Posterior intercostal aa.
Subcostal aa.
Lumbar aa.

Panniculus adiposus refers to an abundance of fat in what layer of tissue?

Subcutaneous tissue

Formal name for the spinous process of C7

Vertebra prominens