Musculoskeletal Anatomy Quiz The bones muscles and muscular

Musculoskeletal Anatomy Quiz The bones, muscles and muscular action below the belt…

What’s to Come T T Quick review of the bones Origin, insertion, and action of muscles Muscles categorized by their action Test yourself with the diagram and click for the answer… All images scanned from: Sieg & Adams, Illustrated Essentials of Musculoskeletal Anatomy

Bones in Review

Pelvis 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. (letters first) Iliac crest Iliac fossa Superior (posterior) gluteal line Middle (anterior) gluteal line Inferior gluteal line Anterior superior iliac spine Anterior inferior iliac spine Posterior superior iliac spine Posterior inferior iliac spine Greater sciatic notch Ischial tuberosity Ischial spine Lesser sciatic notch Ramus of ischium Pubic crest Pubic symphysis Body of pubis Superior ramus of pubis Inferior ramus of pubis A. B. C. D. E. F. G. Ilium Ischium Pubis Acetabulum Obturator foramen Sacrum Coccyx

Femur 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Head Neck Greater trochanter Lesser trochanter Intertrochanteric line Intertrochanteric crest Trochanter fossa Quatrate tubercle Gluteal tuberosity Linea aspera Adductor tubercle Medial epicondyle Lateral epicondyle Patellar surface Medial supracondylar line Lateral supracondylar line Medial condyle Lateral condyle Popliteal surface Intercondylar notch

Tibia and Fibula 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Styloid process Head Neck Interosseous border Lateral malleolus Shaft Medial condyle Lateral condyle Tibial tuberosity Soleal line Shaft Interosseous border Medial malleolus

Foot (without animation)

Extensors of Spine

Spinalis thoracis / cervicis T Origin (3) Insertion (3) Action T T spinous processes of T 11 -12, L 1 -2 transverse processes of T 6 -10 transverse processes of T 1 -6 T Spinous processes of T 1 -8 Spinous processes of C 6 -7, T 1 -4 Spinous processes of C 2 -5 T extend and rotate vertebral column T T

semispinalis thoracis / cervicus Origin (3) Insertion T T Spinous processes of T 1 -8 Spinous processes of C 6 -7, T 1 -4 Spinous processes of C 2 -5 T extend and rotate vertebral column T (3) T Action spinous processes of T 11 -12, L 1 -2 transverse processes of T 6 -10 transverse processes of T 1 -6

Leg / Hip Flexors

Psoas Major Origin Insertion Action T T T (2) T bodies, transverse processes lumbar vertebrae lesser trochanter of femur flexes and rotates thigh laterally flexes vertebrae

Iliacus Origin T iliac fossa of ilium Insertion T lesser trochanter of femur Action T (2) T flexes and rotates thigh laterally flexes vertebrae

Leg Extensors & Abductors

Gluteus Maximus Origin T iliac crest, sacrum, coccyx Insertion T gluteal tuberosity of femur Action T extends and rotates thigh laterally

Gluteus Medius Origin T lateral ilium Insertion T greater trochanter of femur Action T abducts thigh

Gluteus Minimus Origin T lateral ilium Insertion T greater trochanter of femur T abducts thigh Action

Tensor Fasciae Latae Origin T anterior iliac crest Insertion T tibia via iliotibial tract T abducts, flexes thigh Action

Leg Adductors

Adductor Longus Origin T pubic crest near symphysis pubis Insertion T linea aspera of femur Action T adducts, flexes thigh Anterior

Adductor Magnus Origin (2) T T Insertion T (2) T T Action T (3) T ischial tuberosity pubis linea aspera of femur adductor tubercle adducts femur anterior fibers assist flexion of femur at hip Posterior fibers assist extension of femur at hip

Gracilis Origin T pubic ramus Insertion T medial surface of tibial shaft Action T (2) T adducts thigh flexes leg at knee

Leg Flexors

Biceps Femoris Origin (2) Insertion T T T (2) T Action T (2) T long head - ischial tuberosity short head - linea aspera of femur head of fibula lateral condyle of tibia flexes knee extends thigh

Semitendinosus Origin T Insertion T Action T (2) T ischial tuberosity medial, proximal surface of tibia flexes knee extends thigh

Semimembranosus Origin T ischial tuberosity Insertion T medial condyle of tibia Action (2) T T flexes knee extends thigh

Sartorius Origin T Insertion T (2) T Action T (2) T anterior superior iliac spine medial surface of tibia proximal surface of tibia flexes leg and thigh rotates thigh laterally (crosses leg)

Leg Extensors

Rectus Femoris Origin T Insertion T Action T anterior inferior iliac spine patella by common tendon; continues as ligament to tibial tuberosity extends leg at knee

Vestus: medialis, lateralis intermedius Origin medialis lateralis intermedius T T Insertion Action T anterior/medial surface femur greater trochanter femur anterior lateral shaft of femur patella by common tendon; continues as ligament to tibial tuberosity extends leg at knee

Dorsiflexors

Tibialis Anterior Origin Insertion (2) Action (2) T T T lateral condyle/surface of tibia 1 st meta tarsal 1 st cuneiform dorsiflexion inversion of foot

Peroneus Tertius Origin T distal third anterior fibula Insertion T 5 th metatarsal Action (2) T T dorsiflexion eversion of foot

Extensor Digitorum Longus Origin (2) Insertion T T Action T (3) T lateral condyle of the tibia anterior surface of fibula dorsal surfaces of 2 nd, 3 rd phlanges of 4 lateral toes dorsiflexion eversion toe extension

Plantar Flexors

Gastrocnemius Origin T Insertion T Action (2) T T lateral/medial condyles of femur posterior surface of calcaneus plantar flexion of leg at knee

Soleus T head/shaft of fibula posterior tibial surface Insertion T posterior surface calcaneus Action T plantar flexion of foot Origin (2) T

Flexor Digitorum Longus Origin T Insertion T Action T T (3) T posterior surface of tibia distal phlanges of 4 lateral toes plantar flexion inversion of foot flexion of four lateral toes

Tibialis Posterior Origin T Insertion T (2) T Action T (2) T lateral condyle posterior tibial/fibular surface tarsal bones metatarsal bones plantar flexion inversion of foot

Peroneus Longus Origin T T lateral condyle of tibia fibular head/shaft (2) Insertion T (2) T Action (2) T T tarsal metatarsals plantar flexion eversion of foot

Muscles by Action

Hip / Leg Medial Rotator 3. Gluteus medius Gluteus minimus Tensor fasciae latae 4. Petineus 1. 2. 5. 6. 7. Adductor longus Adductor brevis Adductor magnus (horizontal fibers)

Leg Flexor & Extensor Flexors 1. 2. 3. 4. 5. 6. 7. 8. Iliopsoas Pectineus Tensor fasciae latae Adductor brevis Adductor longus Adductor magnus (anterior portion) Rectus femoris Sartorius Extensors 1. 2. 3. 4. 5. Gluteus maximus Biceps femoris (long head) Semitendinosus Semimembranosus Adductor magnus (posterior portion)

Leg Adductors & Abductors 1. 2. 3. 4. Gluteus medius Gluteus minimus Tensor fasciae latae Sartorius Adductors 1. 2. 3. 4. Adductor brevis Adductor longus Adductor magnus Gracilis

Knee Flexors 1. 2. 3. 4. 5. 6. Extensors 1. 2. 3. 4. 5. Vastus lateralis Vastus intermedius Vastus medialis Rectus femoris Tensor fascia latae Biceps femoris Semitendinosus Semimembranosus Sartorius Gracilis Gastrocnemius

Knee Rotators Medial 1. 2. 3. 4. 5. Lateral T Biceps femoris Semitendinosus Semimembranosus Popliteus Gracilis sartorius

Ankle Dorsiflexors 1. 2. 3. 4. Tibialis anterior Extensor digitorum longus Peroneus tertius Extensor hallucis longus Plantar flexors 1. 2. 3. 4. 5. 6. 7. 8. Gastrocnemius Soleus Plantaris Peroneus longus Peroneus brevis Tibialis posterior Flexor hallucis longus Flexor digitorum longus (not shown)

Foot Evertors 1. 2. 3. Peroneus tertius Peroneus longus Peroneus brevis Invertors 1. 2. Tibialis anterior Tibialis posterior