Muscles Of The Neck (2) Flashcards
What are the boundaries of the sub occipital triangle?
Rectus capitis posterior major
Obliques capitis inferior
Obliques captitis superior
Atlanto occipital membrane (floor)
Semispinalis capitis (roof)
What are the contents of the sub occipital triangle?
Part of the external jugular vein
Posterior branches of cervical plexus and spinal accessory nerve
Cervicodorsal trunk and cervical lymph node
What are the boundaries of the carotid triangle?
Superior belly of omohyoid
Posterior belly of digastric
Anterior border of sternocleidomastoid
What are the contents of the carotid triangle?
Common carotid artery
Internal jugular vein
Vagus nerve
Hypogloassal nerve
Spinal accessory nerve
Thyroid gland, pharynx, larynx
Deep cervical lymph nodes
Parts of cervical plexus
What is the origin of the splenius cervicis?
Nuchal ligament
Spinous processes C7-T6
What is the attachment of the splenius cervicis?
Transverse processes of C1-C3
What is the function of the splenius cervicis unilaterally?
Laterally flexes the neck and rotates the head ipsilaterally
What’s the function of the splenius cervicis bilaterally?
Extends the head and the neck
What is the origin of the splenius capitis?
Mastoid process
Lateral 1/3 of superior Nuchal line
What is the attachment of the splenius capitis?
Inferior half of Nuchal ligament
Spinous process of T1-T6
What is the function of the splenius capitis unilaterally?
Flexes and rotates head and neck ipsilaterally
What is the function of the splenius capitis bilaterally?
Extends head and neck
What is the origin of the iliocostalis cervicis?
Cervical transverse process
What is the attachment of the iliocostalis cervicis?
Angles of lower ribs
What is the function of the iliocostalis cervicis bilaterally?
Extend the vertebral column
What is the function of the iliocostalis cervicis unilaterally?
Laterally flex the spine
What is the origin of the longissimus cervicis and capitis?
Transverse process of cervical spine
Mastoid process of temporal bone
What is the attachment of the longissimus cervicis and capitis?
Between tubercles and angles of the ribs
What is the function of the longissimus cervicis and capitis bilaterally?
Extend vertebral column
What is the function of the longissimus cervicis and capitis unilaterally?
Laterally flex the spine
What is the origin of the spinalis cervicis and capitis?
Upper thoracic region
What is the attachment of the spinalis cervicis and capitis?
Cranium
What is the function of the spinalis cervicis and capitis bilaterally?
Extend vertebral column
What is the function of the spinalis cervicis and capitis unilaterally?
Laterally flex the spine
What is the origin of the semispinalis cervicis and capitis?
Transverse process of C4-T12
What is the attachment of the semispinalis cervicis and capitis?
Run superomedially to occipital bone
What is the function of the semispinalis cervicis and capitis?
Extends head, thoracic, and cervical regions of the spine
Contralateral rotation of the same regions
What is the origin of the Multifidus?
Articular processes of C4-C7
What is the attachment of the Multifidus?
Run the entire length of the spinous processes
What is the function of the Multifidus?
Stabilizes vertebrae during local movement of spine
What is the origin of the interspinalis?
Superior aspect spinous process of cervical and lumbar vertebrae
What is the attachment of the interspinalis?
Inferior aspect of spinous process adjacent
What is the function of the interspinalis?
Aids in extension and rotation of spine
What is the origin of the intertransversarii?
Transverse process of cervical and lumbar spine
What is the attachment of the intertransversarii?
Transverse process of adjacent vertebrae
What is the function of the intertransversarii?
Stabilizes the spine bilaterally
Aids in lateral flexion of spine
What is the origin of the rectus capitis posterior major?
Spinous process of C2
What is the attachment of the rectus capitis posterior major?
Lateral part of inferior nuchal line
What is the function of the rectus capitis posterior major?
Extension
Ipsilateral rotation (unilaterally)
What is the origin of the rectus capitis posterior minor?
Posterior tubercle of posterior arch of C1
What is the attachment of the rectus capitis posterior minor?
Medial part of inferior nuchal line (occipital bone)
What is the function of the rectus capitis posterior minor?
Extension
Ipsilateral rotation (unilaterally)
What is the origin of the obliquus capitis inferior?
Posterior tubercle of posterior arch of C1
What’s the attachment of the obliquus capitis inferior?
Transverse process of C1
What is the function of the obliquus capitis inferior?
Ipsilateral rotation (unilaterally)
What is the origin of the obliquus capitis superior?
Transverse process of C1
What is the attachment of the obliquus capitis superior?
Occipital bone between superior and inferior nuchal lines
What is the function of the obliquus capitis superior?
Extension and lateral flexion
What is the origin of the platysma?
Inferior border of mandible
Skin of lower face
What is the attachment of the platysma?
Fascia of superior pec major and deltoid
What is the function of the platysma?
Draw the corners of mouth inferiorly
Tightens skin of neck during clenching
Widens mouth during sadness or fright
What is the origin of the sternocleidomastoid?
Mastoid process
Lateral superior Nuchal line
What is the attachment of the sternocleidomastoid?
Sternal head- anterior manubrium
Clavicular head- medial 1/3 of clavicle
What is the function of the sternocleidomastoid unilaterally?
Ipsilateral lateral flexion and rotates face superiorly to opposite side
What is the function of the sternocleidomastoid bilaterally?
Extends neck
Flexes cervical spine
Extends superior cervical spine during flexion of inferior vertebrae
What is the origin of the anterior scalene?
Transverse process of C3-C6
What is the attachment of the anterior scalene?
1st rib
What is the function of the anterior scalene?
Lateral flexion of neck
Elevates 1st rib during forced inspiration
What is the origin of the middle scalene?
Transverse processes of C5-C7
What is the attachment of the middle scalene?
1st rib
What is the function of the middle scalene?
Lateral flexion of neck
Elevates 1st rib during forced inspiration
What is the origin of the posterior scalene?
Transverse process of C5-C7
What’s the attachment of the posterior scalene?
External border of 2nd rib
What is the function of the posterior scalene?
Lateral flexion of neck
Elevates 2nd rib during forced inspiration
What is the origin of the longus colli?
Bodies of C1-C3
Transverse processes of C3-C6
Anterior tubercle of C1
What is the attachment of the longus colli?
Bodies of C5-T3 vertebra
What is the function of the longus colli?
Flex neck with rotation to opposite side
What is the origin of the longus capitis?
Basilar part of occiput
What is the attachment of the longus capitis?
Transverse process of C3-C6
What is the function of the longus capitis?
Flex head
What is the origin of the rectus capitis anterior?
Base of cranium (anterior to occipital Condyle)
What is the attachment of the rectus capitis anterior?
Anterior lateral mass of C1
What is the function of the rectus capitis anterior?
Flex head
What is the origin of the rectus capitis lateralis?
Jugular process
What is the attachment of the rectus capitis lateralis?
Transverse process of C1
What is the function of the rectus capitis lateralis?
Flexes and stabilizes the head