Lab Practical 2 Review - Muscle Anatomy

Comprehensive question-and-answer flashcards covering muscle origins, insertions, and innervations for Lab Practical 2 review.

What is the origin of the trapezius muscle?

Occipital bone and spinous processes of $C7\text{--}T12$.

What are the insertion and innervation of the trapezius muscle?

Insertion: Clavicle, acromion process, and spine of scapula; Innervation: Spinal accessory nerve.

What is the origin of the rhomboid minor muscle?

Spinous processes of $C7\text{--}T1$.

What are the insertion and innervation of the rhomboid minor muscle?

Insertion: Medial border of the scapula at the root of the spine; Innervation: Dorsal scapular nerve.

What is the origin of the rhomboid major muscle?

Spinous processes of $T2\text{--}T5$.

What are the insertion and innervation of the rhomboid major muscle?

Insertion: Medial border of the scapula between the root of the spine and the inferior angle of the scapula; Innervation: Dorsal scapular nerve.

What are the origin, insertion, and innervation of the pectoralis minor muscle?

Origin: Ribs $3\text{--}4$ (or $3\text{--}5$); Insertion: Coracoid process of the scapula; Innervation: Medial pectoral nerve (and lateral pectoral nerve).

What is the origin of the pectoralis major muscle?

Medial clavicle, sternum, and costal cartilages of ribs $1\text{--}7$.

What are the insertion and innervation of the pectoralis major muscle?

Insertion: Lateral lip of the bicipital groove of the humerus; Innervation: Medial and lateral pectoral nerves.

Identify the muscle highlighted in green on the anterior aspect of the arm and shoulder.

Coracobrachialis

What are the origin, insertion, and innervation of the coracobrachialis muscle?

Origin: Coracoid process of scapula; Insertion: Medial humerus; Innervation: Musculocutaneous nerve.

What are the origin, insertion, and innervation of the levator scapulae muscle?

Origin: Transverse processes of $C1\text{--}C4$; Insertion: Medial border of scapula; Innervation: Dorsal scapular nerve.

What are the origin, insertion, and innervation of the serratus anterior muscle?

Origin: Ribs $1\text{--}9$; Insertion: Anterior surface of the medial border of scapula; Innervation: Long thoracic nerve.

What are the origin, insertion, and innervation of the subclavius muscle?

Origin: 1st rib; Insertion: Clavicle; Innervation: Nerve to subclavius.

What is the origin of the latissimus dorsi muscle?

Spinous processes of $T7\text{--}L5$, posterior sacrum, posterior iliac crest, and inferior angle of scapula.

What are the insertion and innervation of the latissimus dorsi muscle?

Insertion: Medial lip of the bicipital groove of the humerus; Innervation: Thoracodorsal nerve.

What are the origin, insertion, and innervation of the teres major muscle?

Origin: Inferior angle of the scapula and lateral border; Insertion: Medial lip of the bicipital groove of the humerus; Innervation: Lower subscapular nerve.

Identify the rotator cuff muscle highlighted in green in this posterior scapular view.

Supraspinatus

What are the origin, insertion, and innervation of the supraspinatus muscle?

Origin: Supraspinous fossa of scapula; Insertion: Greater tubercle of humerus; Innervation: Suprascapular nerve.

What are the origin, insertion, and innervation of the infraspinatus muscle?

Origin: Infraspinous fossa of scapula; Insertion: Greater tubercle of humerus; Innervation: Suprascapular nerve.

What are the origin, insertion, and innervation of the teres minor muscle?

Origin: Superior lateral border of scapula; Insertion: Greater tubercle of humerus; Innervation: Axillary nerve.

What are the origin, insertion, and innervation of the subscapularis muscle?

Origin: Subscapular fossa of scapula; Insertion: Lesser tubercle of humerus; Innervation: Upper and lower subscapular nerves.

What is the origin of the deltoid muscle?

Lateral clavicle, acromion process, and spine of scapula.

What are the insertion and innervation of the deltoid muscle?

Insertion: Deltoid tuberosity of humerus; Innervation: Axillary nerve.