Lecture 7 Flashcards
Movements of scapula (6)
- Elevation
- Depression
- Protraction
- Retraction
- Lateral rotation
- Medial rotation
Muscles connecting scapula to trunk (5)
- Trapezius
- Rhomboids
- Levator scapulae
- Pectoralis minor
- Serratus anterior
Trapezius
Elevates, retracts and depresses scapula
Largest muscle affecting scapula
Diamond shaped
Rhomboids
Minor and major
Retract scapula: bring towards midline
Serratus anterior
Finger-like projections onto ribs
Attach from anterior surface of scapula to anterior surface of rubs
Brings scapula anteriorly into protraction
Strongest protractor of the scapula
Levator scapulae
Elevates scapula
Sternoclavicular joint
Attaching clavicle to sternum
Acromioclavicular joint
Attaching clavicle to shoulder
Movements of clavicle (5)
- Anteriorly
- Posteriorly
- Superiorly
- Inferiorly
- Rotation
When scapula moves, so does the clavicle
Clavicle
Only boney connection from arm to axial skeleton
Muscles connecting humerus to trunk (2)
- Pectoralis major
2. Latissimus dorsi
Pectoralis major
Flexion, extension, adduction and medial rotation of arm
Anterior to chest, attaches to anterior aspect of arm
Latissimus dorsi
Extension, adduction and medial rotation of arm
Covers most of inferior back
Attached through narrow tendon anteriorly to humerus
Muscles that connect scapula and humerus (2)
- Deltoid
2. Rotator cuff muscles
Deltoid
Major abduction of the arm
Fan shaped muscle that encompasses shoulder
Rotator cuff muscles
4 of them
Tendons stabilize shoulder joint
Shoulder joint
Most mobile joint in body
Upper limb anterior compartment muscles
Flexors
Upper limb posterior compartment muscles
Extensors
Muscle compartments
Mostly muscles in the same compartment have same function and enervation
Muscles in anterior compartment of arm (3)
- Biceps brachii
- Coracobrachialis
- Brachialis
Biceps brachii
Two heads (short and long) Join into one tendon to radius Flexes shoulder and elbow
Coracobrachialis
Small muscle
Only crosses shoulder joint
Only flexes shoulder
Brachialis
Starts at humerus, goes over elbow joint to ulna
Only flexes ulna
Muscles in posterior compartment of arm (1)
- Triceps brachii
Triceps brachii
Extender
Anterior muscle compartment of forearm
Flexors of the hand and fingers
Posterior muscle compartment of forearm
Extensors of hand and the fingers
Muscles of the gluteal region (3)
Cross hip joint and move thigh/femur
- Gluteus maximus
- Gluteus medius
- Gluteus minimus
Gluteus maximus
Extension and lateral rotation of the thigh
Largest muscle of region
Gluteus medius
Abduction of thigh
Gluteus minimus
Abduction of thigh
Muscle compartments of the thigh (3)
- Anterior
- Posterior
- Medial
Muscles of anterior compartment of thigh
Flexors of the thigh, extensors of knee
Muscles of posterior compartment of thigh
Extensors of thigh and flexors of knee
Muscles of medial compartment of thigh
Adductors of thigh
Inner thigh, attach to public bone and parts of hip bone
Inversion of the foot
Move inside of foot up, towards midline
Eversion of the foot
Move outside of foot up, away from midline
Muscle compartments of the leg (3)
- Anterior
- Posterior
- Lateral
Muscles of anterior compartment of leg
Dorsiflexors of the foot
Muscles of posterior compartment of leg
Plantarflexors and inverters of foot
Muscles of lateral compartment of leg
Everters of foot