Download ANPS 019 Black 09-28

ANPS019
September 28, 2011
VICTORY MAY
MUSCLES AND ACTIONS OF THE UPPER EXTREMITY
MUSCLES OF MASTICATION
Mastication: chewing
Temporalis muscle: elevation (bite)
Masseter muscles: elevation (bite)
Lateral Pterygoid muscle: protraction, grinding
Medial Pterygoid muscle: elevation, grinding
NECK MUSCLES
Located posteriorly:
Rectus capitis major and minor muscle
Superior and inferior oblique muscle
Subocciptial muscle
HEAD EXTESNION, ROTATION
Located anteriorly:
Longus capitis muscle
Rectus capitis anterior and lateralis muscle
Anterior vertebral muscle
HEAD FLEXION, TILT
Atlantoaxial joint also allows flexion
NECK MUSCLES
Much of head flexion is done by gravity
If contract both sides, you will flex head and neck
Sternoclediomastoid:
Sternal clavicular head
Muscle that pops out when turns head
Trapezius: located posterior
Bilateral-head flexion
Unilateral-rotation and tilt to opposite side
BACK AND SHOULDER MUSCLES
Located posterior:
Trapezius muscles
Deltoid muscle
Latissimus dorsi muscle
Supraspinatus muscles
Infraspinatus muscle
Teres minor and major muscle
*Superficial muscles on back have everything to do with shoulder and arm movement
BACK AND SHOULDER MUSCLES
Serratus posterior
Superior and inferior muscles
Assist respiration
Erector spinae muscle:
Spinalis muscle
Logissmus muscle
Iliocostalis muscle
Bilateral: back extension (postural)
Unilateral later bending to same side
THORACIC AND SHOULDER MUSCLES
Trapezius: drapes over shoulder
Deltoid muscle
Pectoralis major muscle: 2 insertions
Serratus anterior muscle
Pectoralis minor muscle: insert coracoid process of scapula
SHOULDER MUSCLES (ACTIONS)
Posterior view
A muscle contracts, it shortens
Trapezius muscle:
1. Elevates (goes beyond 90 degrees)
2. Depresses
3. Rotates scapula upward
Deltoid muscle:
1. Abductor of arm at shoulder joint only to 90 degrees
Latissimus dorsi muscle:
1. Adducts
2. Medially rotates arm at shoulder joint
3. Extends arm at shoulder joint
SHOULDER MUSCLES (ACTIONS)
Anterior View
Deltoid Muscle:
1. Abductor of arm at shoulder joint
Pectoralis Minor muscle:
1. Depresses shoulder (example “crossover fly”
Pectoralis major muscle: (latissimus dorsi)
1. Flexion
2. Adducts
3. Medially rotates arm at shoulder joint
Serratus anterior muscle:
1. Protracts scapula
DEEP SHOULDER MUSCLES (ACTIOS)
*ROTATOR CUFF MUSCLES!!!
Functions: rotation of humerus
Hold head of the humerus in shoulder joint
1. supraspinatus muscle (superior scapular fossa)
--abducts arm at shoulder joint
2. infraspinatus muscle (inferior scapula fossa)
-lateral rotation of arm at shoulder joint
3. Teres minor muscle
--lateral rotation of arm at shoulder
4. subscapularis muscle:
-medial rotation at shoulder joint
** all of these attach to the greater tubercle of the humerus
Teres major muscle: attaches to the intertubercalar soleus, so it is not a RTC
DEEP SHOULDER MUSCLES
Scapular protraction and retraction
Rhomboid major and minor muscles
-retracts scapula
Serratus anterior muscle
-protracts scapula