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
