Lesson 2: Muscles And Bones Of The Head And Pectoral Girdle Flashcards
Name the 3 actions for the trapezius. One each for the upper, middle and lower fibres.
Upper fibres - upward rotation and elevation of the scapula. Middle fibers - retraction of scapula. Lower fibers - upward rotation and depression of scapula.
Name the 4 rotator cuffs in order of the most anterior, superior, posterior superior, posterior inferior.
Anterior - subscapularis Superior - supraspinatus Posterior superior - infraspinatus Posterior inferior - teres minor
Name the bone and the following landmarks. 1, 2, 4, 5, 7, 10, 12

Humerus bone.
1: Greater tubercle
2: Lesser tubercle
4: head (epiphysis)
5: Neck
7: Deltoid tuberosity
10: medial epicondyle
12: lateral epicondyle

Name the bone and the following landmarks. 1, 5, 6, 8, 9, 10, 11, 12, 14, 15, 16.

Scapula bone.
1&15: acromial process
5: subscapula fossa
6: medial border
8: Lateral border
9&16: Glenoid cavity
10: Supraspinous fossa
11: Spine
12: infraspinous fossa
14: Coracoid process

The name, insertion, origin and action of the muscle in the picture?

Muscle is the sternocleidomastoid.
Insertion - Mmastoid process on the temporal bone
Origin - Manubrium and medial clavicle.
Action - By itself will rotate head to opposite side. Together will flex neck.
Name the 2 muscles most medial (insertion scapula medial border) and their actions.

Muscles are the Rhomboid major (inferior) and rhomboid minor (superior).
Both muscles have the same action, retracting and stabilising the scapula.
From superior to inferior name the 4 muscles along with their actions.

- Supraspinatus - shoulder abduction (abduction of humerus).
- Teres minor - Laterally rotates shoulder
Both these muscles are also part of the rotator cuff group that help to stabilise the shoulder joint.
- Teres major (last little helper) - medically rotates, extends and addicts shoulder.
- Serrated anterior - upward rotation and protraction of scapular. Also stabilises scapular.
Name the muscle and it’s origins and insertions.

Muscle is the Deltoid muscle (posterior part shown).
As a whole it abducts the shoulder.
Deltoid anterior - flexes and horizontally flexes and medically rotates shoulder.
Deltoid posterior - extends, horizontally extends and laterally rotates shoulder.
Origin follows the bones - lateral clavicle to acromial process to spine of scapula.
Insertion is deltoid tuberosity.
Name this muscle and its actions.

Muscle is the subscapularis.
Also part of the rotator cuff group.
Its actions are to medically rotate and stabilise the shoulder joint.