Posterior Muscles OIA Cheat Sheet (Short) PDF

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Summary

notes for human anatomy and physiology lab...

Description

POSTERIOR MUSCLES CHEAT SHEET Mario Barrera

Grand Canyon University Anatomy & Physiology Lab I

Head & Neck Muscles Muscle

Origin

Trapezius

Occipital bone, ligamentum nuchae, and spinous processes of thoracic vertebrae

Insertion Clavicle, acromion of scapula and scapular spine

Action (1) elevate, retract, depress, or rotate scapula upward, (2) elevate clavicle, or (3) extend neck

Rotator Cuff Muscles (SITS) Muscle

Origin

Supraspinatus Infraspinatus Teres Minor Subscapular

Supraspinous fossa of scapula Infraspinous fossa of scapula Lateral border of scapula Subscapular fossa of scapula

Insertion

Action

Greater tubercle of humerus

Abduction at the shoulder Lateral rotation at shoulder

Lesser tubercle of humerus

Medial rotation at shoulder

Posterior Trunk Muscles (Superior to Inferior) Muscle Rhomboid Major Latissimus dorsi

Origin Spinous processes of superior thoracic vertebrae Spinous processes of inferior thoracic and all lumbar vertebrae, ribs 8–12, and thoracolumbar fascia

Insertion Medial border of scapula from spine to inferior angle Intertubercular sulcus of the humerus

Action Adducts scapula and performs downward rotation Extension, adduction, and medial rotation at shoulder

Muscles of the Brachium Muscle

Triceps Brachii

Origin

Insertion

Long Head: Infraglenoid tubercle of scapula Lateral Head: Posterior humeral surface, above radial groove Medial Head: Posterior humeral surface, below radial groove

Olecranon of ulna

Action

Extension at elbow

Muscles of the Antebrachium (Medial to Lateral) Extensor Carpi Ulnaris

Lateral epicondyle of humerus

Extensor Carpi Radialis Brevis Lateral epicondyle of humerus Extensor Carpi Radialis longus Lateral supracondylar ridge of humerus

Base of fifth metacarpal bone Base of third metacarpal bone Base of second metacarpal bone

Extension and adduction at wrist Extension and abduction at wrist

Glutes Muscle Group Muscle

Origin

Gluteus Maximus

Iliac crest, lateral surface of ilium, sacrum, coccyx, Anterior iliac crest, and lateral surface of ilium

Gluteus Medius

Insertion Iliotibial tract and gluteal tuberosity of femur Greater trochanter of femur

Action Extension and lateral rotation at hip Abduction and medial rotation at hip

Deep Piriformis

Anterolateral surface of sacrum

Greater trochanter of femur

Lateral rotation and abduction at hip

Flexors of the Knee (Hamstrings) (Medial to Lateral) Muscle Semimembranosus Semitendinosus Biceps Femoris

Origin Ischial tuberosity Ischial tuberosity and linea aspera of femur

Insertion Medial condyle of tibia Medial surface of tibia (Pes Anserinus) Head of fibula, lateral condyle of tibia

Action Flexion at knee; extension and medial rotation at hip Flexion at knee; extension and lateral rotation at hip

Triceps Surae (Superficial to Deep) Gastrocnemius Femoral condyles Calcaneus by calcaneal tendon Soleus

Head of fibula and posteromedial shaft of tibia

Extension (plantar flexion) at ankle; inversion of foot; flexion at knee Extension (plantar flexion) at ankle; flexion at knee...