AFERI R

TRIANGLE

The

anterior

triangle

is

present

between

the

sternocleidomastoid

muscle

and

the

median

of

the

neck

SURface

Landmarks

:

1

.

The

mandible

forms

the

lower

jaw

.

It

lower

border

is

horseshoe

shaped

and

is

called

base

of

the

jaw

.

Anteriorly

forms

the

chin

and

can

be

traced

back

forming

the

angle

of

jaw

.

2

.

U-shaped

hyoid

bone

is

present

below

and

behind

the

chin

,

in

the

median

plane

.

Body

of

hyoid

is

continuous

posteriorly

with

the

greater

cornua

which

is

overlapped

in

its

posterior

part

by

the

sternocleidomastoid

muscle

.

3

.

laryngeal

prominence

or

Adams

apple

is

formed

by

the

thyroid

cartilage

of

the

larynx

in

the

median

plane

,

just

below

the

hyoid

bone

.

4

.

The

circoid

cartilage

lies

below

thyroid

cartilage

at

the

upper

end

of

the

trachea

5

.

The

trachea

runs

downwards

and

backwards

from

the

circoid

muscle

.

It

can

be

felt

by

the

cartiliganous

rings

.

It

is

partially

masked

by

the

isthmus

of

thyroid

gland

.

Trac he a

is

palpated

at

suprasternal

notch

which

is

present

in

between

the

tendino

-

us

heads

of

right

left

sternocleidomastoid

muscles

.