Smell disorders

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Olfactory disorders are disorders of the n. olfactorius and olfactory pathways function.

Quantitative olfactory disorders[edit | edit source]

  • In case of reduced sense of smell (hyposmia) or loss of sense of smell (anosmia), exclude diseases of the nasal cavity (chronic inflammation of the mucous membrane);
  • olfactory disorder after trauma - contusion bulbus olfactorius, cranial base fracture at the level of the lamina cribriformis - weeks to months after the injury, most likely caused by cicatricial changes mening;
  • unilateral smell disorder - in affections of the base of the frontal lobes - e.g. meningioma sulci olfactorii, aneurysm and. cerebri anterior [1];
  • hyperosmia - increased perception.

Qualitative olfactory disturbances[edit | edit source]

  • Qualitative olfactory disorders (parosmia, dysosmia) - in inflammation of the upper respiratory tract, in diabetes and Paget's disease;
  • the nasal mucosa richly innervated from the n. V (irritating sensations), as free nerve endings (mediating paini) – hyposmia is usually caused by an affection of the nasal mucosa innervated by the n. V , aromatic sensations (soap, coffee) from irritants (vinegar, ammonia) will be distinguished by the olfactory test - if both are affected, this indicates an impairment of the nasal mucosa innervated by n. V;
  • olfactory hallucinations - psychoses;
  • unciform crisis - one form of epileptic aura, a seizure with hallucinations, induced from the area of ​​the uncus gyri hippocampi by [1] irritation.

Links[edit | edit source]

References[edit | edit source]

  1. a b SEIDL, Zdeněk – OBENBERGER, Jiří. Neurologie pro studium i praxi. 2. edition. Grada Publishing, 2004. ISBN 80-247-0623-7.

References[edit | edit source]

  • AMBLER, Zdeněk. NEUROLOGIE pro lékařské fakulty. 2. edition. 2001. 399 pp. ISBN 80-246-0080-3.

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