Muscular System: Appendicular Muscles Flashcards
Lab 6 and 5.2: Muscles of Upper and Lower Extremities (216 cards)
What is the origin of the trapezius?
- Occipital bone
- spinous process of T1-12
What is the insertion of the trapezius?
- lateral clavicle
- acromion
- scapular spine of scapula
What actions does the trapezius perform?
Scapular
- Rotation
- Retraction
- Elevation
- Depression
Neck extension
Stabilizes shoulder
What is the innervation of the trapezius?
Accessory nerve (Cranial Nerve 11)
What is the origin of the levator scapulae?
Transverse process of C1-4
What is the insertion of the levator scapulae?
Medial border of scapula
What action does the levator scapulae perform?
Elevates scapula
What is the innervation of the levator scapulae?
Dorsal scapular nerve
What is the origin of the rhomboids?
Spinous process
- minor: C7-T1
- major: T2-5
What is the insertion of the rhomboids?
Medial border of scapula
What action do the rhomboids perform?
Retraction of scapula
What is the innervation of the rhomboids?
Dorsal scapular nerve
What is the origin of the pectoralis minor?
Ribs 3-5
What is the insertion of the pectoralis minor?
Coracoid process of scapula
What actions does the pectoralis minor perform?
Scapular
*ABduction
*depression
*downward rotation
- elevates ribs
What is the innervation of the pectoralis minor?
Medial pectoral nerve
What is the origin of the serratus anterior?
ribs 1-9
What is the insertion of the serratus anterior?
Medial border of scapula
What action does the serratus anterior perform?
Scapular
-protraction
-aBduction
-depression
- rib elevation
What is the innervation of the serratus anterior?
Long thoracic nerve
* C05-C07
What is the purpose of the rotator cuff?
To stabilize the humeral head inside the shoulder joint
What are the ‘SITS’ muscles?
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
What is the origin of the deltoid?
Anterior head: Clavicle
Middle head: Acromion
Posterior head: Scapular spine
What is the insertion of the deltoid?
Deltoid tuberosity of humerus of the lateral side of the body