BIO290 Epaxial Muscles
Terms
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- Splenius origin
- Inferior half of nuchael ligament and spinous processes of T1 to T6.
- Splenius insertion
- Transverse processes of C1 to C4, mastoid process, and posterior skull.
- Splenius Actions (2)
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Bilateral: Extension of head and neck
Unilateral: Lateral flexion of head and neck - Splenius innervation
- Cervical and thoracic dorsal rami
- Ilicostalis origin
- Iliac crest, posterior sacrum, and spinous processes of sacrum and lumbar vertebrae.
- Iliocostalis insertion
- Angles of ribs and transverse processes of C4 to C6.
- Iliocostalis actions
- Bilateral: extension of vertebral column and head.
- Second iliocostalis action that I forgot to put on other card
- Unilateral: lateral flexion of vertebral column and head
- Longissimus origin
- Iliac crest, posterior sacrum, and spinous processes of sacrum and lumbar vertebrae.
- Longissimus insertion
- Transverse processes of cervical and thoracic vertebrae, mastoid process of skull
- Longissimus actions
-
Bilateral: extension of vertebral column and head
Unilateral: lateral flexion of vertebral column and head - Spinalis origin
- Iliac crest, posterior sacrum, and spinous processes of sacrum and lumbar vertebrae.
- Spinalis insertion
- Spinous processes of cervical and thoracic vertebrae
- Spinalis action
- Bilateral: extension of vertebral column and head
- Spinalis action (other that I forgot on previous card)
- Unilateral: lateral flexion of vertebral column and head.
- Innervation of iliocostalis, longissimus, spinalis
- Dorsal rami
- Semispinalis origin
- Transverse processes of cervical and thoracic vertebrae
- Semispinalis insertion
- Spinous processes of vertebrae 6-7 segments superior to origin, posterior skill near midline.
- Semispinalis action
-
Bilateral: extension of neck and head
Unilateral: lateral flexion of neck and head - Semispinalis innervation
- Cervical and thoracic dorsal rami
- Multifidus origin
- Transverse processes of cervical, thoracic, lumbar, and sacral vertebrae
- Multifidus insertion
- Spinous processes of vertebrae 2-3 segments superior to origin
- Multifidus action
-
Bilateral: extension of vertebral column
Unilateral: lateral flexion of vertebral column - Multifidus innervation
- Dorsal rami
- Four muscles that are "Superficial epaxial muscles"
- Splenius, iliocostalis, longissimus, spinalis
- Two muscles that are "intermediate epaxial muscles"
- Semispinalis and multifidus
- Description of "superficial epaxial muscles"
- Originate near midline of body and run SUPERIOLATERALLY
- Description of "intermediate epaxial muscles"
- Originate laterally and run SUPEROMEDIALLY
- What are epaxial muscles posterior to?
- Transverse processes
- what are the expacial muscles known as
- true back muscles