anterior and lateral neck Flashcards
action and innervation of platysma
inner: CN VII
action: tighten skin on neck
action and innervation of trapezius
inner: CN XI
action: retract and UR scap
action and innervation of SCM
inner: CN XI
action: flex head and contralat rotation
innervation and action of infrahyoid msucles
inner: ansa cervicalis C1-C3
action: depress hyoid after swallowing
action of suprahyoid muscles
depress mandible when open mouth wide and protrusion of tongue
innervation and action of scalenes
inner: motor branches of C3-C8
action:
- bilat flex neck
- elevate 1st rib during forces inspiration
- unulat flex ipsilateral side
innervation and action of longus coli
inner: branches of cerival and brachial plexi (C2-C6)
action: flex/lat flex neck
innevation and action of longus capitis
inner: branches of cervical plexus (C1-C3)
action: unilat flex and rotate skull to ipsilateral side
innervation and action of rectus capitis anterior
inner: branches of ansa cervicalis (C1-C3)
action: lat flex/rotate skull to ipsilateral side
flex head
innervation and action of rectus capitis lateralis
inner: branches of ansa cervicalis (C1-C3)
action: stabilize skull and flex head
boundries of anterior triangle on neck
- anterior border of SCM
- mandible
contents of anterior triangle
- hyoid bone
- thyroid cartilage
- cricoid cartilage
- superior portion of trachea
- thyroid gland
- submandibular glands
boundries of posterior triagle
- posterior border of SCM
- anterior border of trap
- middle portion of clavicle
contents of posterior trinagle on neck
- cranial nerve XI
- cutaneous branches of cervical plexus
- phrenic nerve
boundries of scalene triangle
- anterior scalene
- middle scalene
- 1st rib
contents of scalene trinagle
- roots and trunks of brachial plexus
- subclavian artery
what is thoracic outlet syndrome
poor circulation to hand and parathesia along medial portion of hand
what is thoracic outlet syndrome caused by
compression of subclavian artery and lower portion of brachial plexus into scalene trinagle
