H&N - Neck Flashcards
Anterior surface marking of C1 to C7
C1 Hard palate
C2 Angle of mandible
C3 Hyoid bone
C4 Thyroid notch
C5 Thyroid
C6 Cricoid
C7 Upper tracheal rings
Level of common carotid bibfurcation
C3-C4
Level of end of pharynx/larynx start of oesophagus/trachea
C5/6
Where do you do a tracheostomy
Emergency situation: Cricothyroid membrane
Normally: 2nd tracheal ring
Fascia in neck
Investing
Prevertebral
Pretracheal
Carotid sheath
Layers that cut through for a tracheostomy
Skin
Subcut fat
Platysma
Investing fascia
Strap musclues (usually pulled away: eg sternohyoid and thyrohyoid)
Pretracheal fascia
Trachea
Fascial spaces
Pretracheal
Retropharyngeal
Prevertebral layer
Which vessels form external jugular vein
Posterior retromandibular and posterior auricular
Course of external jugular vein
Passes down in the superficial fascia, superficial to sternocleidomastoid
Pierces invesiting fascia, superior to clavicle, posterior to sternocleidomastoid
Enters subclavian
Vessels tributing to external jugular vein
Posterior external jugular
Transverse cervical
Supra scapular
Anterior jugular vein
Form at hyoid level,
Pierces investing fascia
Drains into subclavian
Anterior neck triangles
Submental
Submandibular
Carotid
Muscular
Submental triangle boundaries
Mandibular symphysis
Anterior belly of digastric
Body of hyoid bone
Content of submental triangle
Submental nodes
Tributaries forming anterior jugular vein
Submandibular triangle boundaries
Lower border of mandible
Anterior belly of digastric
Posterior belly of digastric
Submandibular triangle content
Submandibular gland
Submandibular lymph nodes
Hypoglossal nerve
Mylohyoid nerve
Facial artery and vein
Carotid triangle boundaries
Posterior belly of digastric
Superior belly of omohyoid
Anterior border of sternocleidomastoid
Carotid triangle content
Common, internal and external carotid arteries
Internal jugular vein, Common facial vein
Cervical branch of facial, CN10,11,12, ansa cervicalis transverse cervical nerve
Muscular triangle boundaries
Midline
Sternocleidomastoid
Superior belly of omohyoid
Muscular triangle content
Muscles: Sternohyoid, omohyoid, thyrohyoid
Thyroid, Parathyroid
Pharynx
Suprahyoid muscles
Stylohyoid
Digastric
Mylohyoid
Geniohyoid
Function of suprahyoid muscles
elevate hyoid bone
Innervation of stylohyoid
Facial
Innervation of digastric muscle
Anterior: mylohyoid (V3)
Posterior: facial nerve