Upper body Muscles and Actions Flashcards
what are the 4 Rotator cuff muscles?
Teres minor
subscapularis
Infraspinatus
supraspinatus
what are the origins and insertions of rotator cuff muscles?
All originate on scapula and insert on humerus
Actions- rotate arm and assist abduction
What are the 3 shoulder joint muscles?
Pec major (on front/anterior) Deltoid (wraps shoulder) Latissimus dorsii (back/posterior)
Where are the shoulder joint muscle origins and insertions
All insert onto humerus
pecs originate clavicle, sternum, ribs
deltoid originates scapula, clavicle
Lats originate illiac crest, vertebrae, scapula
what are the actions of the shoulder joint muscles?
all- medial rotation and adduction of the arm
pecs - also horizontal flexion
What are the 5 muscles of the shoulder girdle?
RLTPS Rhomboids Levator scapulae Trapezius Pec minor Serratus anterior ALL INSERT ON SCAPULA
Where do the rhomboids and levator scapulae originate and insert?
origin- vertebrae
insert- scapula
Where does the trapezius originate and insert?
origin- vertebrae and skull
insertion - scapula and clavicle
Where do the serratus anterior and the pectoralis minor originate and insert?
origin- ribs
insert- scapula
What are the 4 main muscles of the arm?
Triceps brachii
Biceps brachii
Brachialis
brachioradialis
Where do the biceps originate and insert? Action?
originate scapula
insert radius
action flexion, supination
Where do the triceps originate and insert? Action?
originate scapula and humerus
Insert ulna
action extension elbow/shoulder
Where do the brachioradilas and brachialis originate and insert? Actions?
Both originate humerus
brachioradilalis inserts on radius
Brachilais on ulna
Action both flex elbow
What is the action of the gastrocnemius?
Crosses 2 joints Originated on distal tubercles of femur Inserts on calcaneus Action plantar flexion Knee flexion
What is the action of the tibilalis anterior?
Originates on tibia
Inserts on medial cuneiform/metatarsals
Action invasion and dorsiflexion
