Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

Sign Up for a Free Account For information on discounts, see Plans & Pricing

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

Nasal or olfactory placode

In the sixth week of development, the center of each nasal placode (or olfactory placode) grows inwards to form the two nasal pits. The invaginations give rise to the olfactory epithelium that lines the roof of the nasal cavity. Illustration by Henry Vandyke Carter (1831-1897.) (Source: Gray H. Anatomy of the human body. 20th edition. Philadelphia and New York: Lea & Febiger, 1918.)

Related Media

Associated Disorders

  • COVID-19
  • Lewy body dementia
  • Parkinson disease
  • REM sleep behavior disorder