posterior triangle

Question 1

boundaries of posterior triangle

Answer 1

1. ant: sternocleidomastoid
2. post: trapezius
3. inf: middle one third of clavicle
4. apex: supeiror nuchal line where trapezius and sternocleidomastoid meet

Question 2

roof of posterior triangle is made by

Answer 2

superficial fascia

Question 3

superficial fascia of pst triangle has

Answer 3

1. platysma
2. external jugular vein and pst external jugular vein
3. nerves: lesser occipital, greater auricular, transverse cutaneous, supraclavicular
4. arteries: occipital, suprascapular artery, transverse cervical artery
5. supraclavicular lymph nodes

Question 4

tributaries of external jugular vein

Answer 4

pst external jugular vein
anterior jugular vein
transverse cervical vein
suprascapular vein

Question 5

floor of the pst triangle is made by

Answer 5

prevertebral layer of deep cervical fascia

Question 6

floor of the pst triangle has

Answer 6

splenius capitis
semi spinalis capitis
levator scapula
scalenus medius

Question 7

division of pst triangle

Answer 7

by inferior belly of omohyoid- upper triangle is the occipital triangle
lower triangle is the subclavian triangle

Question 8

4 cutaneous brannches of cervical plexus in the pst traingle

Answer 8

transverse cutaneous
supraclavicular
greater auricular
lesser occipital

Question 9

transverse cutaneous

Answer 9

arise from the ventral rami (c2,c3)

supply the skin over the neck till the sternum

Question 10

supraclavicular

Answer 10

ventral rami (c3 and c4) 
medial nerve supplies the manubrium tilll the manubriosternal joint. intermediate one supplies the first intercoastal space till the 2nd rib
lateral part supplied upper half of deltoid

Question 11

greater auricular vein

Answer 11

largest ascending branch of cervical plexus
ventral rami (c2 c3)
ON reaching the parotid gland it divides into ant and pst divisions
ant division supplies the lateral lower one third of the pinna and skin over the gland and connects the gland with the auricotenporal nerve
the pst division supplies the medial lower one third of the pinna

Question 12

lesser occipital

Answer 12

vental rami c2 and supplies the medial two thirds of upper pina

Question 13

the most common swelling in pst triangle is because of ?

Answer 13

supracavicular lymph nodes

Question 14

supraclavicular lymph nodes get swelled up in what diseases

Answer 14

hodgkins disease tuberculosis