Muscle Anatomy 16-30

What is the Origin of the Rhomboid Minor?

What is the Origin of the Rhomboid Minor?

Spinous process of lower cervical

What is the Insertion of the Rhomboid Minor?

Medial border of scapula

What is the Action of the Rhomboid Minor?

Rotates and elevates scapula

What is the Innervation of the Rhomboid Minor?

Dorsal Scapular Nerve

What is the name of this Muscle? (A)

Rhomboid Major

What is the Origin of the Rhomboid Major?

Spinous Processes of upper thoracic vertebrae

What is the Insertion of the Rhomboid major?

Medial Border of Scapula

What is the Action of the Rhomboid Major?

Retracts, elevates, and rotates scapula

What is the Innervation to the Rhomboid Major?

Dorsal Scapular nerve

What is the name of this Muscle? (C)

Levator Scapulae

What is the Origin of the Levator Scapulae?

Transverse processes of cervical vertebrae

What is the Insertion of the Levator Scapulae?

Medial border of scapula

What is the Action of the Levator Scapulae?

Elevates scapula

What is the Innervation of the Levator Scapulae?

Dorsal scapular and Cervical nerves

What is the name of this muscle?

Serratus Anterior

What is the Origin of the Serratus anterior?

Anterior surfaces of upper ribs

What is the Insertion of the Serratus anterior?

Medial border of scapula

What is the Action of the Serratus anterior?

Protracts and rotates scapula

What is the Innervation of the Serratus anterior?

Long thoracic nerve

What is the name of this Muscle? (A)

Pectoralis major

What is the Origin of the Pectoralis major?

Clavicle, sternum, and costal cartilages of upper ribs

What is the Insertion of the Pectoralis major

Intertubercular sulcus of humerus

What is the Action of the Pectoralis major?

Flexes shoulder, adducts, and rotates arm medially

What is the Innervation of the Pectoralis major

Pectoral nerve

What is the name of this Muscle (B)?

Pectoralis minor

What is the origin of the Pectoralis minor?

Anterior surface of ribs 3 to 5

What is the Insertion of the Pectoralis minor?

Coracoid process of scapula

What is the Action of the Pectoralis minor?

Depresses and protracts scapula, elevates ribs during forceful inhalation

What is the Innervation of the Pectoralis minor?

Pectoral nerve

What is the name of this Muscle?

External intercostals

What is the name of this Muscle?

Internal intercostals

What is the name of this Muscle? (A)

Diaphragm

What is the name of this Muscle?

Deltoid

What is the Origin of the Deltoid?

Acromion process, spine of the scapula, and the clavicle

What is the Insertion of the Deltoid?

Deltoid tuberosity of humerus

What are the Actions of the Deltoid?

Lateral portion abducts arm, Anterior portion flexes shoulder, Posterior portion extends shoulder

What is the Innervation of the Deltoid?

Axillary nerve

What is the name of this Muscle?

Latissimus Dorsi

What is the Origin of the Latissimus Dorsi?

Spines of sacral, lumbar, and lower thoracic vertebraem, iliac crest, and lower ribs

What is the Insertion of the Latissimus Dorsi?

Intertubercular sulcus of humerus

What is the Action of the Latissimus Dorsi?

Extends shoulder and adducts and rotates arm medially

What is the Innervation of the Latissimus Dorsi?

Thoracodorsal Nerve

What is the name of this Muscle?

Subscapularis

What is the Origin of the Subscapularis?

Anterior surface of scapula

What is the Insertion of the Subscapularis?

Lesser tubercle of humerus

What is the Action of the Subscapularis?

rotates arm medially

What is the Innervation of the Subscapularis?

Subscapular nerve

What is the name of this Muscle?

Supraspinatus

What is the Origin of the Supraspinatus?

Supraspinous fossa of scapula

What is the Insertion of the Supraspinatus?

Greater tubercle of humerus

What is the Action of the Supraspinatus?

abducts arm

What is the Innervation of the Supraspinatus?

suprascapular nerve

What is the Name of this muscle?

Infraspinatus

What is the Origin of the Infraspinatus?

Infraspinous fossa of scapula

What is the Insertion of the Infraspinatus?

Greater tubercle of humerus

What is the Action of the Infraspinatus?

rotates arm laterally

What is the Innervation of the Infraspinatus?

upper and lower suprascapular nerves

What is the Name of this muscle?

Teres Minor

What is the Origin of the Teres Minor?

lateral border of scapula

What is the Insertion of the Teres Minor?

Greater tubercle of humerus

What is the Action of the Teres Minor?

rotates arm laterally

What is the Innervation of the Teres Minor?

Axillary nerve

What is the name of this muscle? (A)

Rhomboid minor