Papers on the mastoid region of the skull / by Ambrose Birmingham.

  • Birmingham, Ambrose.
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: Papers on the mastoid region of the skull / by Ambrose Birmingham. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    10/40
    S, lateral sinus; B, Reid’s base line; F, level of floor of middle fossa of skull; T, triangle in which drill-hole may be made. It is small in this case ; the sinus arches up very high, and comes far forward Observe marked curve' of sinus and its relation to base line. (From a photo.) Fig. 2. S, lateral sinus ; B, Reid’s base line ; F, floor of middle fossa ; T, triangle for drill-hole. The triangle is large in this case; lateral sinus- considerable distance from meatus; F is rather low. Observe relation of sinus to base line. The round mark in front of T is the point corresponding to the antrum. (From a photo.) Fig. 3. S, lateral sinus ; B, Reid’s base line; F, floor of middle fossa; T, triangle for drill-hole ; triangle large. This is the only case in which the lateral sinus lies near the base line. (From a photo.)