Posterior Triangle of Neck Flashcards
Skin of Back of Scalp innervated by….
Dorsal Rami of spinal nerves C2-C5
Skin of Anterior and Lateral Scalp innervated by….
Ventral Rami of C2-C4
Lesser Occipital Nerve
from C2, C3
Supplies skin over lateral part of occipital region and upper part of medial surface of auricle
Great Auricular Nerve
from C2, C3
supplies skin over angle of mandible and parotid gland and both surfaces of lower part of auricle
Transverse Cervical Nerve
from C2, C3
Supplies skin of anterior and lateral aspects of neck
Supraclavicular Nerves
from C3, C4
Supply skin at base of neck and skin covering upper parts of pectoralis major and deltoid muscles
Platysma
embedded in superficial fascia
Tenses neck, depresses mandible, draws down lower lip and angle of mouth
inn by cervical branch of facial n (CN VII)
Posterior Auricular Vein
Drains scalp posterior and superior to auricle
drains into external jugular v
Retromandibular V
formed w/in parotid gland by superficial temporal and maxillary v
divides into anterior and posterior branches
Anterior Branch of Retromandibular V
drains into facial vein
Posterior Branch of Retromandibular V
joins posterior auricular v to make the external jugular v
External Jugular V
drains into subclavian vein
Tributaries of External Jugular Vein
Transverse Cervical, Suprascapular, and Anterior Jugular Veins
Sternocleidomastoid
Attaches at sternum and clavicle and at mastoid process
supplied by ventral rami C2 and C3
Unilateral Contraction of Sternocleidomastoid
flex head and neck to side of contraction
rotation of head and neck to opposite side of contraction
