Ilyas Muscles Origins And Insertions

Front 1

Back muscles

Back 1

Trapezius, Latisimus dorsi,

Levator scapula, Rhomboids,

Erector spinae group, Quadratus lumborum

Front 2

Trapezius

Back 2

Origin: External occipital protuberance

Spinous processes of C7-T12

Insertion: Lateral third of clavicle

Acromion process

Scapular spine

Actions: Extends the neck and head

Elevates the scapula

Upwardly rotates the scapula

Retracts the scapula

Front 3

Latissimus Dorsi

Back 3

Origin: Spinous process of T7-L5, Ribs 9-12

Posterior iliac crest

Posterior sacrum

Inferior angle of scapula

Insertion: Intertubercular groove of the humerus

Actions: Extends the humerus

Medially rotates the humerus

Adducts the humerus

Front 4

Levator Scapulae

Back 4

Origins: Transverse processes of cervicle vertebrae C1, C2, C3, C4.

Insertion: Medial border of the scapula

Superior angle to root of the spine

Actions: Elevates the scapula

Downwardly rotates the scapula

Laterally flexes the neck

Stabilizes the scapula

Front 5

Rhomboids major

Back 5

Origin: Spinous process of T2-T5

Insertion: Medial border of the scapula from root of scapular spine to the inferior angle

Actions: Retracts the scapula

Downwardly rotates the scapula

Stabilizes the scapula

Front 6

Rhomboids minor

Back 6

Origin: Spinous processes of C7-T1

Insertion: Medial border of the scapula from the superior angle to the root of the scapular spine

Actions: Retracts the scapula

Downwardly rotates the scapula

Stabilizes the scapula

Front 7

"Erector Spinae" group

Back 7

Spinalis, Longissimus, Iliocostalis.

Front 8

Quadratus lumborum

Back 8

Origin: Posterior iliac crest

Insertion: Spinous processes of C2 + upper thoracic

Occipital bone

Front 9

Shoulder muscles

Back 9

Deltoid, Coracobrachialis, Pectoralis major, Pectoralis minor, Rotator cuff (SITS), Teres major, Serratus anterior

Front 10

Deltoid

Back 10

Origin: Lateral third of clavicle

Acromion proccess

Scapular spine

Insertion: Deltoid tuberosity of the humerus

Actions: Flexes the humerus

Medially rotates the humerus

Abducts the humerus

Extends the humerus

Laterally roataes the humerus

Front 11

Coracobrachialis

Back 11

Origin: Coracoid process

Insertion: Middle portion of medial humeral shaft

Actions: Flexes the humerus

Adducts the humerus

Front 12

Pectoralis Major

Back 12

Origin: Medial 1/2 clavicle

Edge of sternal body

Ribs 1-7 Costal cartilage

Insertion: Intertubercular groove of the humerus(Bicipital groove)

Actions: Adducts the humerus

Medially rotates the humerus

Flexes the humerus

Extends the humerus

Front 13

Pectoralis Minor

Back 13

Origin: Ribs T3, T4, T5 (lateral to costal cartilage)

Insertion: Coracoid process

Action: Depresses the scapula

Protracts the scapula

Downwardly rotates the scapula

Assists in forced inspiration

Front 14

Supraspinatus

Back 14

Origin: (proximal attachement) Supraspinous fossa

Insertion: (Distal attachement) Superior aspects of tubercle of humerus

Actions: Abducts the humerus

Front 15

Infraspinatus

Back 15

Origin: Infraspinous fossa of the scapula

Insertion: Middle part of the greater tubercle of the humerus

Actions: Laterally rotates the humerus

Front 16

Subscapularis

Back 16

Origin: subscapular fossa

Insertion: Lesser tubercle of humerus

Action: Medially rotates arm and stabilizes shoulder joint.

Front 17

Teres minor

Back 17

Origin: Superior Two thirds of the lateral border of the scapula

Insertion: Greater tubercle of the humerus

Actions: Laterally rotates the humerus

Adducts the humerus

Front 18

Teres major

Back 18

Origin: Inferior third of the lateral border of the scapula

Insertion: Intertubercular groove of the humerus.

(Medial lip)

Actions: Extends the humerus

Medially rotates the humerus

Adducts the humerus

Front 19

Serratus Anterior

Back 19

Origin: Ribs 1-8 or 9 (Lateral costal cartilage exterior surface of the rib)

Insertion: Anterior medial border of the scapula

Action: Protracts the scapula

Upwardly rotates the scapula

depresses the scapula

Front 20

Hip muscles

Back 20

Gluteus maximus, Gluteus medius, Gluteus minimus, Piriformus, Gemellus superior, Gemellus inferior, Obturator externus, Obturator internus, Quadratus femoris

Front 21

Gluteus maximus

Back 21

Origins: Posterior sacrum
Posterior coccyx
Posterior iliac crest
External ilium to the posterior gluteal line
Insertions: Gluteal tuberosity(25%)
Iliotibial band(75%)

Actions: Extends the hip

Laterally rotates the hip

Adducts the hip

Posteriorly tilts the pelvis

Front 22

Gluteus medius

Back 22

Origin: External ilium between the anterior and posterior gluteal lines
Insertion: Greater trochanter

Actions: Abducts the hip

Medially rotates the hip

Laterally rotates the hip

Anteriorly and posteriorly tilts the pelvis

Front 23

Gluteus minimus

Back 23

Origin: External ilium between the anterior and inferior gluteal lines
Inserion: Greater trochanter

Actions: Abducts the hip

Medially rotates the hip

Laterally rotates the hip

Anteriorly and posteriorly tilts the pelvis

Front 24

Piriformis

Back 24

Origin: Anterior sacrum
Insertion: Greater trochanter

Actions: Laterally rotates the hip

Abducts the hip

Front 25

Gemellus Superior

Back 25

Origin: Ischial spine
Insertion: Greater trochanter

Action: Laterally rotates the hip

Front 26

Gemellus Inferior

Back 26

Origin: Superior ischial tuberosity
Insertion: Greater trochanter

Action: Laterally rotates the hip

Front 27

Obturator externus

Back 27

Origins: Obturator membrane
Superior pubic ramus
Inferior pubic ramus
Ischial ramus
Insertion: Greater trochanter

Front 28

Obturator internus

Back 28

Origins: Obturator membrane
Obturator margin
Insertion: Greater trochanter

Actions: Laterally rotates the hip

Front 29

Longissimus

Back 29

Origin: Posteriorsacrum

Transverse processes of T1-T5, L1-L5

Transverse processes of C5-C7

Insertion: Mastoid process

Transverse processes of C2-T12

Ribs 4-12(posterior)

Front 30

Quadratus femoris

Back 30

Origin: Lateral ischial tuberosity
Insertion: Intertrochanteric crest

Front 31

Psoas major

Back 31

Origins: Transverse processes of T12-L5
Vertebral bodies of T12-L5
Intervertebral disks of lumbar vertebrae
Insertion: Lesser trochanter

Front 32

Gracilis

Back 32

Origin: Inerior pubic ramus
Insertion: Medial proximal tibial shaft

Front 33

Quadratus femoris

Back 33

Origin: Lateral Ischial tuberosity

Insertion: Intertrochanteric crest

Action: Laterally Rotates the hip

Adducts the hip

Front 34

Tensor Fasciae Latae

Back 34

Origins: Anterior iliac crest

Anterior superior iliac spine (ASIS)

Insertion: Iliotibial band

Actions: Abducts the hip

Flexes the hip

Medially rotates the hip

Front 35

Adductors

Back 35

Pectineus, Adductor longus, Gracilis, Adductor bravis, Adductor magnus

Front 36

Adductor magnus

Back 36

Origins: Ischial tuberosity

Inferior pubic ramus

Ischial ramus

Insertion: Linea aspera

Adductor tubercle of the femur

Actions: Adducts the hip

Flexes the hip

Extends the hip

Front 37

Adductor longus

Back 37

Origin: Anterior pubic body

Insertion: Middle third of the linea aspera (medial lip)

Action: Abducts the hip

Front 38

Adductor brevis

Back 38

Origin: Inferior pubic ramus

Insertion: Proximal third of the linea aspera (ML)

Actions: Adducts the hip

Front 39

Pectineus

Back 39

Origins: Superior pubic ramus

Pectineal line on pubis

Insertion: Posterior proximal femoral shaft (inferior to lesser trochanter)

Action: Flexes the hip

Adducts the hip

Front 40

Quadriceps femoris

Back 40

Rectus femoris, Vastus lateralis, Vastus medialis, Vastus intermedius

Front 41

Rectus femoris

Back 41

Origins: Anterior inferior iliac spine (AIIS)

External ilium just superior to the acetabulum

Insertions: Tibial tuberosity

Actions: Flexes the hip

Extends the knee

Anteriorly tilts the pelvis

Front 42

Vastus Intermedius

Back 42

Origin: Anterior lateral femoral shaft

Insertion: Tibial tuberosity

Action: Extends the knee

Front 43

Vastus medialis

Back 43

Origins: Linea aspera (medial lip)

Intertrochanteric line

Insertion: Tibial tuberosity

Action: Extends the knee

Front 44

Vastus lateralis

Back 44

Origins: Linea aspera (lateral lip)

Gluteal tuberosity

Inserion: Tibeal tuberosity

Action: Extends the knee

Front 45

Sartorius

Back 45

Origin: Anterior superior iliac spine (ASIS)

Insertion: Medial proximal tibial shaft

(at pes anserine)

Actions: Flexes the hip

Laterally rotates the hip

Abducts the hip

Flexes the knee

Medially rotates the leg

(when the knee is flexed)

Front 46

Popliteus

Back 46

Origin: Lateral condyle of femur

Insertion: Posterior proximal tibial shaft

Actions: Flexes the knee

Medially rotates the leg

(when the knee is flexed)

Front 47

Hamstrings

Back 47

Biceps femoris, semiMembranosus, semiTendinosus

Front 48

Semimembranosus

Back 48

Origin: Ischia tuberosity

Insertion: Medial condyle of the tibia

(posterior surface)

Actions: Flexes the knee

Medially rotates the leg (WKF)

Extends the hip

Medially rotates the hip

Posteriorly tilts the pelvis

Front 49

Semitendinosus

Back 49

Origin: Ischial tuberosity

Insertion: Medial proximal tibial shaft

(at the pes anserinus)

Actions: Flexes the knee

Medially rotates the leg (WKF)

Extends the hip

Medially rotates the hip

Posteriorly tilts the pelvis

Front 50

Biceps femoris

Back 50

Origins: Ischial tuberosity (long head)

Linea aspera; lower lateral lip

Insertion: Fibular head

Actions: Flexes the knee

Laterally rotates the leg

(when knee is flexed)

Extends the hip

Laterally rotates the hip

Posteriorly tilts the pelvis

Front 51

Pes Anserinus

Back 51

SArtorius, GRACilis, semiTEndinosus