The stimulus travels to the auditory nerve - the eighth cranial nerve
Conductive hearing loss is the result of interrupted trans mission of sound waves through the outer and middle ear struc tures.
Conductive hearing loss - possible causes are a tear in the tympanic membrane or an obstruction, due to swelling or other causes, in the auditory canal.
Sensorineural hearing loss is the result of damage to the inner ear, the auditory nerve, or the hearing center in the brain
Mixedhearingloss is a combination of conduction and sensorineural loss.
whisper test - 1-2 feet
positiverinne - air conduction > bone conduction
negative rinne - bone conduction > air conduction
To inspect the external canal and tympanic membrane in chil dren less than 3 years old, pull the pinna down and back. In
Sensorineural hearing loss occurs in adults
Presbycusis - Generalized hearing loss
the upper third of the nose is bone
Ethmoid and maxillary sinuses are present at birth;
frontal si nuses begin to develop by 1 to 2 years of age
Ethmoid sinuses continue to develop until age 12.
Nosebleeds may result from hypertensive disease or other arterial vessel changes.
Cough and runny nose are the most common signs of sinusitis in preadolescent children.
By age 25, most people have all their permanent teeth.
The parotid gland is the largest and empties through Stensen’s duct opposite the second molar.
The submandibular gland empties through Wharton’s duct, which is situated on either side of the frenulum on the floor of the mouth
The sublingual salivary gland lies in the floor of the mouth and has numerous openings.
Dental caries - cavities
pyorrhea - periodontal disease
Dental caries and periodontal disease - are the two problems that most frequently affect the teeth.