Angular gyrus damage

Introduction The Hornback Syndrome was first reported by Gerstmann in 1924, including four symptom groups: finger disrecognition, computational inability, writing inability, and left-right orientation disorder. Also known as the left corner syndrome; dominant hemisphere syndrome. For patients with trauma, carbon monoxide poisoning, lead poisoning or various shocks, in addition to interventions, drugs that promote brain cell function recovery can be used. Developmental angulation syndrome (DGS) refers to children with a loss of specific learning ability on the basis of finger disrespect in Gerstmann syndrome, left and right misidentification, loss of writing and miscalculation.

Cause

The parietal lobe and the temporal lobe of the main hemisphere are retrograde, and the occlusion of the posterior apical artery or the angular artery is common. Can also be seen in brain tumors, brain trauma, brain atrophy, alcoholism, carbon monoxide poisoning, various mental illness, hypnosis and so on. Such as cerebral arteriosclerosis, stroke, cerebrovascular malformations. Also pay attention to the effects of drugs, old injuries to the affected area, etc., which are diseases of neurosurgery.

an examination

Related inspection

Brain CT examination

Speech comprehension and expression ability are normal, and the cognitive existence of objects and spaces, under the premise of no sensory movement and intelligence, the following four symptoms appear.

1. Finger recognition can not: the name and recognition ability of each finger of the hands of oneself or others is lost. Most cases can still be called and recognized by the thumb and the little finger, but the other 3 fingers cannot be recognized and called. Can mimic the action of the examiner's finger.

2. Calculation can not: patients can not use the calculation, can not read and write the numbers, can not mentally add, subtract, multiply, divide, the concept of time, weight, volume, distance and so on is unclear. Although it can be simple mental arithmetic at times, when the calculation is performed, the spatial position cannot be grasped. Therefore, the wrong line and the number of bits are often made, and the position of the pen calculation is often biased to the lower end, but the concept of numbers and numbers can be well understood.

3. Writing can't (loss of writing): Can't control the size and position of writing, often write typo or non-existent words, similar words, reverse characters (mirror text), vertical and horizontal strokes of text, missing words, grammatical errors, Semantic errors, meaningless words, and the same word are continuous, but the concept of words is still preserved.

4. Left and right orientation force obstacles: not only can not understand and distinguish their own left and right, and can not distinguish the spatial orientation, such as stretching their right or left hand, lifting the right or left foot and other actions, resulting in left and right discrimination can not be confused, shoes, Gloves can't be distinguished.

Differential diagnosis

Identification:

(a) cerebral infarction. This syndrome is common in the posterior apical and posterior occlusion of the main hemisphere. The patient is older and has a history of hypertension or arteriosclerosis. There is no cause of illness after sleep or morning sickness. Infarction involving the temporal lobe often accompanied by paroxysmal mental disorders, but also auditory hallucinations, visual hallucinations and memory defects. Involvement of parietal lobe may be associated with loss of structure, hemiplegia, and aphasia.

(B) parietal tumors. The dominant side hemisphere tumor appears in this syndrome. Before the onset of neurological symptoms, a special epileptic sign, a short-lived physical disorder, can sometimes occur. These signs are easily mistaken for functional mental disorders. Most benign tumors are caused by epilepsy, and malignant tumors are often caused by headache.

(3) Carbon monoxide poisoning. The neurological aftermath that occurs after the pseudo-healing period is manifested as a mental disorder. In addition to the manifestations of neurological symptoms, the Bajinsen's sign is most prominent.

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