Chapter 8 Neck Flashcards
The SCM visibly divides each side of the neck into?
anterior and laterally cervical regions
The neck is divide into what regions?
SCM, Posterior cervical,lateral cervical ,anterior cervical regions
The SCM has how many heads?
It has two heads
Sternal head and clavicular head
The SCM heads are divided by?
Lesser supraclavicular fossa
The floor of the posterior cervical region is formed by?
Splenius capitis, levatore scapulae, posterior and middle scalene
The anterior portion of the posterior cervical triangle?
Posterior side of SCM
Posterior border of posterior cervical triangle?
Anterior border of Trapezius
Inferior portion of Posterior cervical triangle?
Clavicle ( between SCM And Traps)
Superior portion of posterior cervical triangle?
The junction of traps and SCM
The roof of the posterior cervical triangle?
Platymsa and investing layer of deep fascia
Superior attachment of SCM?
Lateral mastoid process of temporal bone
Lateral half superior nuchal line
Inferior attachment of SCM?
Clavicular- superior medial surface of third clavicle
Sternum- anterior surface of manubrium of sternum
Innervation of SCM?
Accessory nerve CN XI
Sensory C2 C3
Actions of SCM?
Unilateral contraction: tilts head and rotates it
Bilaterally:
extends neck at Atlanto-occipital
Flexes cervical vertebrae so that chin approaches manubrium
Extends superior cervical vertebrae while flexing inferior
Origin of scalene anterior?
Anterior tubercles of of transverse processes of C3-C6
Insertion of anterior Scalene?
1st rib
Innervation of Anterior scalene
Cervical spinal nerves C4-C6
origin of middle scalene?
Posterior tubercles of transverse processes C4-C7
Insertion of Middle Scalene?
Superior surface of first rib
Innervation of middle Scalene?
Anterior rami of cervical spinal nerve
Main action of anterior and middle scalene?
Flexes neck laterally
Elevates 1st rib during forced respiration
Origin of posterior scalene?
Posterior tubercles of transverse process of C4-C6
Insertion of posterior scalene?
External border of second rib
Innervation of posterior scalene?
Anterior rami of cervical spinal nerve C7 and C8
Action of posterior scalene
Flexes neck laterally
Elevates 2nd rib during forceful respiration
Spinal accessory nerve passes through
Deep into SCM
Into the fascisa over levator scapulae
Penetrates trapezius
What does the root of Brachial Plexus (C5-C8 and T1)
Anterior and middle scalene
The brachial plexus provides Innervation too
All the upper limbs
Supra scapular nerve arise from?
brachial plexuses
Cervical plexus C1-C4 breaks into what
Cutaneous branch and phrenic nerve
What nerve point of your neck?
Cutaneous branch around SCM
Lesser occipital nerve C2 supplies
The skin of the neck
Scalp posterior superior to the auricle
Great auricular nerve C2-c3 supplies
Skin posterior of auricle and area of the mandible to the mastoid
Transverse cervical nerve C2 and C3 supplies
Anterior cervical region
Supraclavicular nerve C3 C4 supplies
The skin of shoulder
Phrenic nerve C4 supplies
Diaphragm
What drains into the external jugular.
Suprascapular
Anterior jugular
Cervical dorsal
Where the external jugular end
Subclavian vein
The brachiocephalic is made from the
Internal jugular vein and subclavian vein
Suprascapular artery arises from
Cervicodorsal artery trunk
Cervical dorsal trunk ( transverse cervical artery)
Comes from
Thyrocervical artery
Occipital artery supplies
Posterior half of scalp
