Cranial nerve function examination

We all know that the human nervous system is very important to humans. Many actions in life require the control of the nervous system to be completed. The nervous system controls almost all human actions, so the nerve function must not be damaged. When human behavior is not controlled by consciousness, it is necessary to do some functional tests on the nervous system. So which nerve functions need to be checked?

Normal value

There are many items included in the cranial nerve examination, and only some of them are listed here, such as: auditory nerve examination: normal hearing, able to correctly distinguish the sounds heard, no eye tremor, eyes closed walking test, walking test, and positional nystagmus examination are all normal and can stand with eyes closed.

Motor examination of the facial nerve: no asymmetry of the facial muscles during rest, speech, and facial expressions. For more details, please visit the various sub-examinations of cranial nerve examination.

Clinical significance

Abnormal results: The cranial nerve examination includes many items. The abnormal results of various examinations indicate lesions in different parts of the brain and different nerves. For details, please browse the various sub-examinations of the cranial nerve examination. People who need to be examined: patients with symptoms such as facial pain and hearing abnormalities.

Precautions

Unsuitable people: None Pre-examination contraindications: Maintain normal diet and rest time. Requirements during examination: Try to relax your facial muscles when the doctor is examining you, don't be too nervous, and actively cooperate with the doctor's work.

Inspection process

There are many items in cranial nerve examination, only a few are listed here:

(1)

Olfactory nerve examination: The sensitivity of the sense of smell can be understood through questioning.

(2)

Visual field examination: Visual field refers to the range that the patient can see when looking straight ahead without moving his eyes.

(3)

Trigeminal nerve examination: The trigeminal nerve has both motor and sensory functions. The examination includes facial sensation, motor function, corneal reflex and jaw reflex.

(4)

The facial nerve examination consists of two parts: movement and taste.

(5)

The auditory nerve examination includes hearing test and vestibular function test, which is used to determine whether there is any lesion in the cochlear and vestibular nerve.