Miologia_Greya

Muscle

Origin

Insertion

Innervation

Function

Latissimus dorsi 2 Spinous processes of TVII to

Floor of intertubercular sulcus

Thoracodorsal

Extends, adducts, and

LV and sacrum, iliac crest,

of humerus

nerve (C6 to C8)

medially rotates humerus

ribs X to XII

Rhomboid major 4 Spinous processes of

Medial border of scapula

Dorsal scapular

Retracts (adducts) and

TII to TV

between spine and inferior

nerve (C4, C5)

elevates scapula

angle

Splenius cervicis 9 Spinous processes of TIII

Transverse processes of

Posterior rami

Together—extend neck;

to TVI

CI to CIII

lower cervical

individually—draw and rotate

nerves

head to one side (turn face to

same side)

3

1

6

5

4

Muscle

Origin

Insertion

Iliocostalis lumborum

1

Sacrum, spinous processes of lumbar and lower two

Angles of the lower six or seven ribs

thoracic vertebrae and their supraspinous ligaments, and

the iliac crest

Iliocostalis thoracis

2

Angles of the lower six ribs

Angles of the upper six ribs and the transverse

process of CVII

Iliocostalis cervicis

3

Angles of ribs III to VI

Transverse processes of CIV to CVI

Longissimus thoracis

4

Blends with iliocostalis in lumbar region and is attached to

Transverse processes of all thoracic vertebrae

transverse processes of lumbar vertebrae

and just lateral to the tubercles of the lower nine

or ten ribs

Longissimus cervicis

5

Transverse processes of upper four or five thoracic

Transverse processes of CII to CVI

vertebrae

Longissimus capitis

6

Blends with iliocostalis in lumbar region and is attached to

Transverse processes of all thoracic vertebrae

transverse processes of lumbar vertebrae

and just lateral to the tubercles of the lower nine

or ten ribs

Spinalis thoracis

7

Spinous processes of TX or TXI to LII

Spinous processes of TI to TVIII (varies)

Spinalis cervicis

8

Lower part of ligamentum nuchae and spinous process of

Spinous process of CII (axis)

CVII (sometimes TI to TII)

Spinalis capitis

9

Usually blends with semispinalis capitis

With semispinalis capitis

Semispinalis thoracis

10

Transverse processes of TVI to TX

Spinous processes of upper four thoracic and

lower two cervical vertebrae

Semispinalis cervicis

11

Transverse processes of upper five or six thoracic

Spinous processes of CII (axis) to CV

vertebrae

Semispinalis capitis

12

Transverse processes of TI to TVI (or TVII) and CVII and

Medial area between the superior and inferior

articular processes of CIV to CVI

nuchal lines of occipital bone

Multifidus

13

Sacrum, origin of erector spinae, posterior superior iliac

Base of spinous processes of all vertebrae from

spine, mammillary processes of lumbar vertebrae,

LV to CII (axis)

transverse processes of thoracic vertebrae, and articular

processes of lower four cervical vertebrae

Rotatores lumborum

14

Mammillary processes of lumbar vertebrae

Spinous processes of lumbar vertebrae

Rotatores thoracis

15

Transverse processes of thoracic vertebrae

Spinous processes of thoracic vertebrae

Rotatores cervicis

16

Articular processes of cervical vertebrae

Spinous processes of cervical vertebrae

6

8

12

9

11

3

5

10

2

Muscle

Origin

Insertion

Function

Muscle

Origin

Insertion

Innervation

Function

Rectus capitis

1

Spinous process of

Lateral portion of occipital bone

Posterior ramus

Extension of head; rotation

posterior major

axis (CII)

below inferior nuchal line

of C1

of face to same side as muscle

Rectus capitis

2

Posterior tubercle of

Medial portion of occipital bone

Posterior ramus

Extension of head

posterior minor

atlas (CI)

below inferior nuchal line

of C1

Obliquus capitis

3

Transverse process of

Occipital bone between

Posterior ramus

Extension of head and bends it to

superior

atlas (CI)

superior and inferior nuchal

of C1

same side

lines

Obliquus capitis

4

Spinous process of

Transverse process of atlas (CI)

Posterior ramus

Rotation of face to same side

inferior

axis (CII)

of C1

4

1

Muscle

Origin

Insertion

Innervation

Function

Pectoralis

1 Medial half of clavicle and

Lateral lip of intertubercular

Medial and lateral

Adduction, medial rotation,

major

anterior surface of sternum,

sulcus of humerus

pectoral nerves

and flexion of the humerus at

first seven costal cartilages,

the shoulder joint

aponeurosis of external

oblique

Pectoralis

3 Anterior surfaces of the third,

Coracoid process of scapula

Medial pectoral

Depresses tip of shoulder;

minor

fourth, and fifth ribs, and deep

nerves

protracts scapula

fascia overlying the related

intercostal spaces

External

4 Inferior margin of rib above

Superior margin of rib below

Intercostal nerves;

Most active during inspiration;

intercostal

T1–T11

supports intercostal space;

moves ribs superiorly

Innermost

6 Medial edge of costal groove

Internal aspect of superior

Intercostal nerves;

Acts with internal intercostal

intercostal

of rib above

margin of rib below

T1–T11

muscles

1

3

4

5

6

Muscle

Origin

Insertion

Innervation

Function

Rectus

4

Pubic crest, pubic tubercle,

Costal cartilages of ribs V to

Anterior rami of

Compress abdominal

abdominis

and pubic symphysis

VII; xiphoid process

lower seven

contents; flex vertebral

thoracic spinal

column; tense abdominal

nerves (T7 to T12)

wall

Pyramidalis

5

Front of pubis and pubic

Into linea alba

Anterior ramus of

Tenses the linea alba

symphysis

T12

Psoas major

6 Lateral surface of bodies of

Lesser trochanter of the

Anterior rami

Flexion of thigh at hip joint

TXII and LI to LV vertebrae,

femur

of L1 to L3

transverse processes of the

lumbar vertebrae, and the

intervertebral discs between

TXII and LI to LV vertebrae

Iliacus

9 Upper two thirds of iliac fossa, Lesser trochanter of femur

Femoral nerve

Flexion of thigh at hip joint

anterior sacro-iliac and

(L2 to L4)

iliolumbar ligaments, and

upper lateral surface of

sacrum