Intrisic Muscles of the back Flashcards
Splenius capitis: origin
-Nuchal ligament -Thoracic spinous processes
Splenius capitis: insertion
-mastoid process -occipital bone
Splenius capitis: innervation
dorsal rami
Splenius capitis: action
Bilateral: extend neck Unilateral: lateral flexion, rotation to ipsilateral side of neck
Splenius cervicis: origin
-nuchal ligament -thoracic spinous processes
Splenius cervicis: insertion
-Mastoid process -Cervical transverse processes
Splenius cervicis: innervation
dorsal rami
Splenius cervicis: action
Bilateral - extension of neck Unilateral - lateral flexion, rotation to ipilateral side of neck
Iliocostalis:origin
-iliac crests -Sacrum -lumbar spinous processes
Iliocostalis: insertion
-Ribs -Transverse processes
Iliocostalis: innervation
dorsal rami
Iliocostalis: action
Bilateral: extend vertebral column Unilateral: lateral flexion, rotation to ipsilateral side
Longissimus: origin
-iliac crest -Sacrum -lumbar spinous procesess
Longissimus: insertion
-Transverse processes -mastoid process
Longissimus: innvervation
dorsal rami