Early symptoms of auditory nerve damage may involve hearing or balance problems as the auditory system communicates information concerning sound and body positioning to the brain. Symptoms include tinnitus, sensorineural hearing loss, dizziness, or vertigo with or without vomiting and nausea.owever, this is not usually the case. Most deaf people have conductive hearing loss due to damage in the middle ear structures. Neural hearing loss due to auditory nerve damage is much less common than conductive hearing loss and is usually irreversible.
The permanently frozen ground in the northern latitudes is called permafrost. The layer closest to the surface that thaws during the summer is also part of the permafrost, but is called the active layer.
There are large swaths of the world that haven't gotten above freezing since the last ice age, and the mixture of soil, rock and water that makes up the ground in those areas is called permafrost. Actually, the uppermost layer of soil can go through cycles of freezing and thawing, but right underneath is a layer of permafrost that stays hard and frozen all the time.