Ch 11 pt 3

muscles

what is the insertion and origin of the sternocleidomastoid

origin- manumbrium of sternum and anterior surface of medial clavicle

insertion- mastoid process

what are the actions of the sternocleidomastoid

extension of the head on cervical spine

flexion of the cervial spine

contraleteral rotation

ipsilateral side bend

what is the origin and insertion of the anterior scalene

origin-transverse process of C3-C6 vertebrae

insertion- 1st rib 

what are the actions of the Anterior scalene 

cervical spine flexion 

ipsilateral side bend 

contralateral rotation 

elevate rib 1 during forced inspiration 

where is the origin and insertion of the splenium capitus 

origin- inferior one half of ligamentum nuchae and spinous process of c1-c3

insertion- transverse process of c1-c3 

splenius cervicis origin and insertion

origin - spinous process of T3-T6 

insertion- transverse process of c1-c3

what are the actions of the splenous muscles both Cervicis and capitus 

 both sides - extension of the head (captious) and neck (cervisis and capitis)

Right side- rotation and lateral flecion to the right of the head and cervical spin e

left side- rotation and lateral flexion to the left of the head and cervical spine 

what are the erector spinae muscles “i like spinach”

illocostalis (most lateral)

lonissimus 

spinalis (most medial)

where is the origin and insertion of the illocostalis

origin- posterior Sacrum, posterior iliac crest, sacroiliac ligaments, 

sacral and inferior lumbar spinous process, supraspinous ligament

insertion-  posterior ribs 1-12, cervical 4-7 transverse process 

where is the origin and insertion of the longissimus

origin- posterior Sacrum, posterior iliac crest, sacroiliac ligaments, 

sacral and inferior lumbar spinous process, supraspinous ligament

insertion- cervical 2-6 spinous process, thoracic 1-12 transverse processes, lower nine ribs, mastoid process 

what is the origina and insertion of the spinalis

origin- posterior Sacrum, posterior iliac crest, sacroiliac ligaments, 

sacral and inferior lumbar spinous process, supraspinous ligament

insertion- second cervial spinous process, thoracic 5-12 spinous process, occipital bone 

what are the actions of the erector spinae muscles

extension, lateral flexion and ipsilateral rotation of the spine and head

anterior pelvic tilt

lateral pelvic rotation to contralateral side

quadratus lumborum origin and insertion

origin- illiocolmbar ligament and posterior inner lip of illiac crest

insertion- inferior border of 12th rib and transverse process of the lumbar vertebrae

what are the actions of the quadratus lumborum

ipsilateral side bend

elevation of pelvis 

stabilizes 12th rib during inspiration during inspiration 

what are the muscles of the abdominal wall

rectus abdominus

external oblique

internal oblique 

transervse abdominus 

rectus abdominis origin and insertion

origin- pubic symphysis and pubic crest

insertion- xiphoid process and 5th-7th costal cartilegest

rectus abdominus actions

both sides - flexion of the side, posterior pelvic rotation 

right side- weak lateral flexion to the right 

left side- weak lateral flexion to the left 

transverse abdominis origin and insertion

origin- lateral third of the inguinal ligament, inner rim of the illiac, inner surface of the 7th-12 the costal cartilgeges

what is the action of the transverse abdominus 

supports abdominal wall and viscera

forced expiration by pulling the abdominal wall inward 

internal oblique origin and insertion 

origin- upper half of the inguinal inguinal ligament, anteriro two thrid of the crest of the illium and lumbar fascia 

insertion- inferior borders 10th-12th ribs and linear alba 

what are the actions of the internal obliques

both sides- lubar flexion

ipsilateral lumbar side bend

ipsilateral trunk rotation 

external obliques origin and insertion

origin- external surfaes 5th-12th ribs

insertion- linea alba, pubic, tubercles, and anterior half of illiac crest