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22 Cards in this Set
- Front
- Back
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Anopthalmia
(most common form) |
absence of ocular structures
Secondary- Forebrain defect- several structures are affected |
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Cyclopia
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I eye, 1 orbit
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Synopthalmia
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2 eyes, 1 orbit
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Coloboma iridis
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Failure of the optic stalk to completely close
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Congenital Detachment of the Retina
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Failure of the intraretinal space to close
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Congenital Cararact
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Clouding of the Lens
from interference with lens Devo Rubella |
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Congenital Glaucoma
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increased occular fluid pressure from abnormal development of the fluid-draining sources of the eye
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Persistent Pupillary Membrane
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Hyoid vessels don't regress and stay in fromnt of the lens...can cover pupil
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Coloboma
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failure of complete closure of the CHOROID FISSURE
(hole in one of the structures of the eye) |
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Congenital Ptosis
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levator palpebrae muscle
injury to occulomotor nerve |
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Microopthalmos
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reduction in volume of eyeball
most severe= Clinical Anopthalmia |
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Cryptopthalmos
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absence of EYELIDS
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Anotia-Microtia Spectrum
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small auricle
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auricular tags
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7th auricular hillock develops (usually only 6)- may form tag in front of tragus. may signal neurosensory defect
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auricular sinus
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pits, fistula
duplication of the 1st pharyngeal cleft- sinus running along face below ear- deafness |
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Otocephaly
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auricles don't move superiorly- usually due to MANDIBULAR HYPOPLASIA (1st arch didn't develop correctly) (Mickel's cartilage)
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Mandibular Dystosis can cause
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Low Set Ears
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Mental Atresia or Hypoplasia
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absence of extrernal auditory meatus...stack of ectodermal cells fails to canalize
ABSENSE OF HOLE (bilateral) |
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Cholesteatoma
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benign growth of endoderm in the tympanic cavity medial to the eardrum
*overgrowth of endodermal tissue |
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Vestibular Cochlear Dysplasia
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flattented cochlea and decreased number of turns causes underdeveloped vestibular structures. (poor hearing and balance)
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2 types of congenital hearing loss
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1) Conduction- external and/or middle ear problem- sound not transmitted to cochlea
2) Sensorineural- inner ear- nerve problem- no signal generated for transmission to brain |
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what is the inheritance pattern of congenital hearing loss?
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autosomal recessive
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