Review of the anatomy of the neck Flashcards
which layer comes directly beneath the skin
superificial fascial layer
superificial fascial layer
contains fat, superficial lymph nodes and the platysma
platysma
which is the first of the deep. erical layer
the investing layer
the investing layer
encircles the neck like a collar
splitting to surround the SCM anteirorly and the trapezius muscle posteriorly
what is this muscle
sternocleidomastoid
what is this muscle
trapezius
infrahyoid muscles sit below the level of the
hyoid bone
suprahyoid
sit above the hyoids
boundary of the antirior triangle is formed by the
lateral- anteiorr border of the SCM
medial- imaginary mid line in saggital plane
superior- inferior border of the mandible
what is found within the anteiror triangle
important subtriangles
-carotid triangle
carotid triangle borders
lateral wall- SCM
medial wall- superior belly of omohydoid
superior wall- posterior belly of digastric
content of the carotid triangle
common carotid artery (which bifurcates within the carotid triangle into the external and internal carotid arteries)
the internal jugular vein
the hypoglossal and vagus nerves
posterior triangle
has a number of key structures which communicate betwen the enck and the upper limb
boundaries of the posterior triangle
anteiror - posteiror part of the SCM
posterior- trapzius
infeiror- clavical
scalene muscles form the floor
what runs across the posterior triangle
infeiror belly of omohyoid
important contents of the posteior triangle
subclavian artery (behind vein) and vein run through this triangle before entering the upper limb
trunk of the brachial plexus
phrenic nerve
subclavian artery runs behind the scalene muscles whilst the vein runs in front of the scalene muscles
thryoid gland is tucked in between the
infrahyoid muscles
important vasculature of the neck
external jugular vein (not in carotid triangle or sheath)
internal jugular vein
common carotid artery
deep cervical layers
prevertebral dascia (blue)
carotid sheath and contents (red)
pre-tracheal fascia- continuous posteriorly around pharynx as the buccopharyngeal fascia
found between the prevertebral fasica and the pre-tracheal fascia
retropharngeal space
an area where infection and absecces may collect–> can pass into the mediastinum and the thorax
