Sandbox:Christina

Wikidoc

Otosclerosis

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] CSN, M.D. Christina Ninan, M.D.

Overview

Otosclerosis is a word derived from the Greek word "sklērós" meaning hardening and oto meaning ear. Otosclerosis is a disorder in which the footplate of the stapes is replaced by an abnormal bone, thereby affecting sound transmission to the inner ear at the level of the oval window.

Historical perspective

This recommendation is of particular importance in connection with new or infrequently used drugs.

Classification

Medicine is an ever-changing science. As new research and clinical experience broaden our knowledge, changes in treatment and drug therapy are required. The authors and the publisher of this work have checked with sources believed to be reliable in their efforts to provide information that is complete and generally in accord with the standards accepted at the time of publication.

Etiology

USMLE

• USMLE STEP 1
• USMLE STEP 2
  • USMLE STEP 2 CK
  • USMLE STEP 2 CS
• USMLE STEP 3
  • USMLE STEP 3 MCQ
  • USMLE STEP 3 CCS

Pathophysiology

92F + atrial fibrillation + numbness/tingling of her right leg; where is the stroke lesion?

1. left or right side of the brain?

à answer = left (contralateral).

1. medial or lateral cerebral hemisphere?

àanswer = medial (homunculus for lower limb is

medial, upper limb and face are lateral).

1. anterior or posterior to the central sulcus?

ànswer = posterior (primary sensory cortex

is posterior; primary motor is anterior).