Posterior cervical traingle

Question 0

Sternocleidomastoid Inferior Attachment

Answer 0

sternal head- anterior surface of manubrium of sternum

clavicular head- supperior surface of medial third of clavicle

Question 1

Sternoclideomastoid Superior Attachment

Answer 1

lateral surface of mastoid process of temporal bone and lateral half of superior nuchal line

Question 2

Sternocliedomastoid innervation

Answer 2

spinal accessory and c2 c3

Question 3

Sternocliedomastoid Main actions (Unilateral, bilateral, together)

Answer 3

Unilateral contraction: tilts head to same side and rotates it so face is turned superiorly toward opposite side
Bilaterally: 1) extends neck at atlanto occipital joints
2)flexes cervical vertebrae so chin approaches manubrium
3) extends superior cerical vertebrae while flexing inferior vertebrae so chin is thrust forward with head kept at level
With cervical vertebrae fixed may elevate manubrium and medial end of clavicle, assisting in pumping hanndle action of deep respiration

Question 8

Roof of PCT

Answer 8

investing layer of deep cervical fascia

Question 9

floor of PCT

Answer 9

formed by muscles coered by the prevertebral layer of deep cervical fascia

Question 10

Posteriorcervical traingle Anterior border

Answer 10

posterior border of the SCM

Question 11

PCT posterior border

Answer 11

trapezius

Question 12

PCT inferior border

Answer 12

middle third of the clavicle between the trapezius and SCM

Question 13

Apex of PCT

Answer 13

where the SCM and trapezius meet on the superior nuchal line of occipital bone