Symptoms of internal capsule injury

summary

Internal capsule: the internal capsule is the name of a part through which the nerve fibers connecting the cerebral cortex, brain stem and spinal cord pass. It is located between the basal ganglia and thalamus. The motor nerve fibers and sensory nerve fibers leading to the cerebral cortex radiate upward through the inner capsule.

Symptoms of internal capsule injury

The basal ganglia of the brain is the most common site of hemorrhage. It is called intracapsular hemorrhage because it damages the internal capsule. In addition to the general symptoms of intracerebral hemorrhage, patients with intracapsular hemorrhage often have the head and eyes turning to the side of the hemorrhagic focus, presenting the symptoms of "staring at the focus" and "three biases", namely hemiplegia, hemiparesthesia and hemiblindness. Aphasia may occur if hemorrhage occurs in the dominant hemisphere.

One of the common cerebral hemorrhage. Most of them were caused by hemorrhage of basal ganglia and damage of internal capsule. The main clinical manifestations were gaze focus like and "three deviation" symptoms, namely hemiplegia, hemiparesthesia and hemiblindness.

Hemiplegia, hemiplegia occurred on the opposite side of the bleeding site, initially delayed paralysis, tendon reflex disappeared; After a few days or weeks, it turned into spastic paralysis, with lower limb extension, tendon hyperreflexia and upper limb flexion adduction, showing typical upper motor neuron hemiplegia.

matters needing attention

The posterior limb of the internal capsule is the site where the motor and sensory fibers are highly concentrated. The infarction of the posterior limb of the internal capsule often causes the damage of the corticospinal tract and the thalamic cortical tract at the same time. Sometimes, although it is a lacunar lesion, it causes serious sensory and motor damage, and the prognosis is poor. Infarction in the posterior limb of internal capsule is not uncommon in clinical practice, and a considerable number of patients with progressive stroke are infarction in the posterior limb of internal capsule.