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Back Extrinsic Muscles
Back Extrinsic Muscles
10
Anatomy
Graduate
01/10/2011

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Cards

Term
First Layer
Definition
Trapezius, Latissimus Dorsi
Term
Second Layer
Definition
Rhomboid Group. Rhomboid Major/Mnior, Levator Scapulae
Term
Third Layer
Definition
Serattus Posterior Group
Term
Trapezius: Origin, Insertion, Innervation, Vessels, Actions.
Definition
Origin: Superior Nuchal Line, External occipital protuberance Insertion: Clavicle, Acromion, spine Innervation: Spinal accessory(motor) Vessels:Superficial branch of transverse cervical artery Actions: Elevation, retraction and rotation of scapula
Term
Latissimus dorsi. Origin, Insertion, Innervation, Vessels, Actions.
Definition
Origin - Spinous processes of T7-12, iliac crest ribs 9-12

Insertion: intertubercular groove of humerus

Innervation: Thoracondorsal Nerve

Vessels: Thoracodoral artery

Action: EAM(Extends, adducts and medially rotates) Swimming
Term
Rhomboid Major. Origin, Insertion, Innervation, Vessels, Actions.
Definition
Origin- spines T2-T5

Insertions: Root of spine of scapula

Innervation - Dorsal scapular nerve

Blood supply - deep branch of transverse cervical artery

Action: Adducts scapula - Push up
Term
Levator Scapulae - Origin, Insertion, Innervation, Vessels, Actions.
Definition
Origin: Transverse processes of c1-c4

Insertion: Medial border of scapula

Innervation: Dorsal scapular nerve

Action: Elevates scapula; rotates glenoid cavity
Term
Rhomboid minor -Origin, Insertion, Innervation, Vessels, Actions.
Definition
Origin: Spines T2-T5

Insertion: medial border of scapula

Innervated: Dorsal scapula nerve

Action: adduction of the scapula, push ups
Term
Serratus Posterior-superior. Origin, Insertion, Innervation, Vessels, Actions.
Definition
Origin: ligamentum nuchae, supraspinal ligament, spines c7-T3

Insertion: Upper border of ribs 2-5

Innvervation:Intercostal Nerve

Action: Elevates ribs
Term
Serratus posterior-inferior Origin, Insertion, Innervation, Vessels, Actions.
Definition
Origin: supraspinous ligament and spines T11-L3

Insertion: Lower border of ribs 9-12

Innervation: Intercostal Nerve

Action: Depresses ribs
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