Object numberGC.5394
DescriptionExternal ear.
The basal portion of a skull, showing congenital bilateral absence of the tympanic element of the. From a deaf-mute male congenital imbecile aged 19 years. He was physically well developed. Each auricula was represented by a small rounded fleshy nodule some 5 mm, in diameter. He seemed to derive some satisfaction from a low-pitched, monotonous, and regularly accentuated crooning noise which he made with his mouth shut. The skull is microcephalic, the cranial capacity being 1280 c.cm. The mandible was strong and well-developed. The congenital absence of the tympanic element is primarily associated with absence of the tympanic membrane, absence of the external acoustic meatus, a deficiency in the bony portion of the auditory tube, and with absence of the vaginal plate of the styloid process. The secondary defects are absence of the auditory ossicles, modification of the auricula, and defective pneumatization.
G.C.5394.
Production periodLate nineteenth/early twentieth century
Object nameBONE, skull
Object categoryAnatomical, specimen
Dimensions
- Jar Height: 23 cm
Diameter: 15 cm