Flashcards in Anatomy Deck (65)
What is the ala of the nose?
the side of the nostrils
What is the philtrum?
the dip in the upper lip
Superior bone of the nasal cavity
Inferior bone of the nasal cavity
What does the ethmoid bone contribute to in the nose? (3)
the roof, the lateral walls and the septum
What does the ethmoid bone contribute to in the roof of the nose?
the cribiform plate and the crista galli (the anterior cranial fossa)
What does the ethmoid bone contribute to in the lateral wall of the nose?
the superior and middle conchae, ethmoid air cells and orbital plate of the ethmoid
Which Le Fort fractures can disrupt the cribiform plate?
types II and III
3 types of epithelium in the nasal cavities?
keratinised stratified squamous epithelium; respiratory epithelium; olfactory mucosa
What is the pterion
the H-shaped sutures between the frontal, parietal, temporal and sphenoid bone which is the thinnest part of the skull
Which bone contains the oragns of hearing and balance ?
Which nerves are contained within the temporal bone?
Facial nerve, vestibulocochlear
What are the two parts to the temporal bone?
the squamous and petrous part
Where is the external ear?
from the auricle to tympanic membrane
Where is the middle ear?
the tympanic membrane to the oval window
What is contained in the middle ear?
the eustachian tube
What is the role of the middle ear?
amplify and conduct the sound waves to the internal ear
Where is the internal ear?
the oval window to the internal acoustic meatus
What is the role of the interal ear?
converts special sensory info into fluid waves and APs --> the brain
What is the helix of the ear?
the ring of cartilage around the outside of the ear
Nerve supply to the auricle of the ear (4)
C2,3 spinal nerve (most of auricle); CN VII (dotted around the opening); CN X (the inferior part of the external acoustic meatus + some tympanic membrane); CN V3 (the superior part of the external acoustic meatus + most of tympanic membrane)
where does the lateral surface of the superior half of the auricle drain?
parotid lymph nodes
Where does the cranial surface of the superior half of the auricle drain?
mastoid lymph nodes (deep and cervical)
Where does the rest of the auricle drain?
the superficial lymph nodes
Where is the eventual pathway of all the auricular lymphatic drainage?
deep cervical nodes --> thoracic duct or R. lymphatic duct --> venous angle
Skeleton of the external ear?
temporal bone and elastic cartilage
Type of cartilage around the external ear?
What composes the ear canal?
skin, cartilage, bone
What glands produce earwax?