What are the disorders of special senses?

What are the disorders of special senses?

Diseases of the Senses

  • macular degeneration. macular degeneration, group of blinding disorders that cause the gradual deterioration of the retina in the eye.
  • glaucoma.
  • ear squeeze.
  • colour blindness.
  • eye disease.
  • conjunctivitis.
  • deaf-blindness.
  • keratitis.

How does nervous system work with special senses?

Specialized cells and tissues within these organs receive raw stimuli and translate them into signals the nervous system can use. Nerves relay the signals to the brain, which interprets them as sight (vision), sound (hearing), smell (olfaction), taste (gustation), and touch (tactile perception).

What nerves carry information about the special senses?

Nerves that carry information from sensory receptors to the central nervous system only are called afferent nerves. Other neurons, known as efferent nerves, carry signals only from the central nervous system to effectors such as muscles and glands.

What is Hypogeusia caused by?

Hypogeusia is a reduced ability to taste things (to taste sweet, sour, bitter, or salty substances). The complete lack of taste is referred to as ageusia. Causes of hypogeusia include the chemotherapy drug bleomycin, an antitumor antibiotic, Bell’s Palsy, and zinc deficiency among others.

What are the symptoms of a failure of the sensory system?

They may scream when touched. They may recoil from the textures of certain foods. But others seem unresponsive to anything around them. They may fail to respond to extreme heat or cold or even pain.

Which of the following is an example of a special sense?

Special senses include vision (for which the eyes are the specialized sense organs), hearing (ears), balance (ears), taste (tongue), and smell (nasal passages). General senses , in contrast, are all associated with the sense of touch.

Where are special senses located?

The special sensory receptors for sight and hearing are located in large, complex sensory organs—the eyes and the ears. Those for smell and taste are located in organs that function in other systems—the nose in the respiratory system and the mouth in the digestive system.

What are 3 diseases of the nervous system?

Nervous system diseases

  • Alzheimer’s disease. Alzheimer’s disease affects brain function, memory and behaviour.
  • Bell’s palsy.
  • Cerebral palsy.
  • Epilepsy.
  • Motor neurone disease (MND)
  • Multiple sclerosis (MS)
  • Neurofibromatosis.
  • Parkinson’s disease.