Week 1 - wet room Flashcards
The most common joint between the bones in the skull is what?
suture - fibrous joint
What are the 3 divisions of the skull?
neurocranium
viscerocranium
mandible
What are the 3 layers of the skull bone?
2 layers of compact bone with diploe inbetween
What part of the skull bone houses the red marrow?
diploe/spongy bone
What are the 3 main sutures of the skull called?
sagittal, coronal and lamboid
What bone are the mastoid process and styloid process a part of?
temporal
What bones is the zygomatic arch made from?
temporal and zygoma
Name 2 structures which pass through the foramen magnum?
medulla and meninges
vertebral arteries
What are the borders of the scalp?
supraorbital margins, zygomatic arches and superior nuchal lines
Name the 5 layers of the scalp
skin connective tissue (dense) aponeurosis of occipitofrontalis muscle loose connective tissue pericranium
Action of contraction of the anterior belly of the occipitofrontalis muscle?
raise eyebrows
Behind the ear what is the nerve supply to this region for cutaneous innervation?
C2,3
What layer of the scalp has blood vessels present?
top 2
Would wounds to scalp bleed sparingly or profusely?
profusely - vasoconstriction is prevented leading to dilated blood vessels and a rich blood supply
What is the superficial temporal artery a branch of?
ECA
What are valveless diploic veins called?
emissary veins
What can occur due to valveless veins in infection?
meningitis
What are 2 ways in which facial expression muscles differ to skeletal muscles?
They are superficial
Attach directly to skin or other muscles
Name some muscles of facial expression
orbicularis occuli/oris, platysma, occipitofrontalis muscle, buccinator
Innervation of facial expression muscles?
facial nerve - cranial nerve 7
What foramen does the facial nerve emerge on to the face?
stylomastoid foramen
What are some symptoms of bells palsy?
drooping eyelid, cannot close eye
cannot close mouth, droop
difficult to chew food - bite inside of cheek
How does the parotid duct enter the oral cavity?
Overlies the masseter and pierce the buccinators and enter opposite the 2nd upper maxillary molar
What salivary glands does the facial nerve innervate?
submandibular and sublingual
What nerve carries parasympathetic fibres for the parotid gland?
glossopharyngeal
Sympathetic innervation to the parotid gland is by what means?
cervical ganglia through the ECA
