1. General organisation Flashcards
define suture
fibrous joints between bones of neurocranium
2 parts of skull
neurocranium, viscerocranium
nerve supply to muscles of mastication
mandibular branch of trigeminal nerve
‘cheek bone’
zygotic arch
name the muscles of facial expression
-occipitofrontalis
-orbicularis oculi
-orbicularis oris
-buccinator
-zygomaticus major
-risorius
occipitofrontalis function
-raise eyebrows
-wrinkle forehead skin
what connects two halves of occipitofrontalis?
epicranial aponeurosis
test for orbiculares oculi function
ask patient to squeeze eyes closed, and try to open them with force
mouth dilator muscles (smile)
-zygomaticus major
-risorius
where does platysma tense the skin?
anterior neck
facial nerve is which cranial nerve?
vii
cause of lump over parotid gland
-malignancy
-surgery
commonest cause of facial nerve lesions
Bell’s palsy
Bell’s palsy aetiology
idiopathic, presumed infective
scale for severity of facial lesions
house-brackmann scale
nerve supply to muscles of facial expression
extra cranial branches of facial nerve
trapezius origin and insertion
origin: occipital bone, nuchal ligament
insertion: lateral 1/3 clavicle, acromion
nerve supply to trapezius
accessory nerve
floor or posterior triangle
-scalene muscles
-posterior belly of omohyoid
what runs in roof of posterior triangle?
external jugular vein (very superficial and visible)
contents of posterior triangle
-trunks of brachial plexus
-subclavian artery
-subclavian vein
-phrenic + accessory nerves
retropharyngeal abscess symptoms
-unwell, fever
-difficulty swallowing, drooling
-painful neck movements
-sore throat
AIRWAY OCCLUSION POSSIBLE
mediastinitis
infection from retropharyngeal space extends into thorns and mediastinum
scalene muscle function
accessory muscles of respiration
