Congenital unilateral absence of the corticospinal tract in a Siamese cat.
نویسندگان
چکیده
A Siamese kitten presented with mild gait dysfunction associated with periodic circling. Pathologic investigation revealed unilateral (right-sided) absence of the corticospinal (pyramidal) tract throughout its normal course. Although an infectious cause cannot be completely ruled out a genetic etiology was suspected.
منابع مشابه
Dominance of ipsilateral corticospinal pathway in congenital mirror movements.
OBJECTIVE To clarify the mechanism of congenital mirror movements. DESIGN The triple stimulation technique (TST) and the silent period were used to investigate a patient with congenital mirror movements. The TST was used to calculate the ratio of ipsilateral to contralateral corticospinal tracts from the two hemispheres to the spinal motor neurones. RESULTS Transcranial magnetic stimulation...
متن کاملChanges in corticospinal efficacy contribute to the locomotor plasticity observed after unilateral cutaneous denervation of the hindpaw in the cat.
We used microwire electrodes chronically implanted into the hindlimb representation of the motor cortex as well as into the pyramidal tract to test the hypothesis that the corticospinal system contributes to the locomotor plasticity that is observed after cutaneous denervation of the cat hindpaw. A total of 23 electrodes implanted into the motor cortex in three cats trained to walk on a treadmi...
متن کاملMotor cortex bilateral motor representation depends on subcortical and interhemispheric interactions.
The corticospinal tract is a predominantly crossed pathway. Nevertheless, the primary motor cortex (M1) is activated bilaterally during unilateral movements and several animal studies showed that M1 has a bilateral motor representation. A better understanding of the uncrossed corticospinal system is especially important for elucidating its role in recovery of limb control after unilateral injur...
متن کاملPlasticity of motor network and function in the absence of corticospinal projection
Despite the obvious clinical interest, our understanding of how developmental mechanisms are redeployed during degeneration and regeneration after brain and spinal cord injuries remains quite rudimentary. In animal models of spinal cord injury, although spontaneous regeneration of descending axons is limited, compensation by intact corticospinal axons, descending tracts from the brainstem, and ...
متن کاملAgenesis of Right Lung: A Rare Congenital Disorder
Pulmonary agenesis is a rare congenital anomaly in which there is absence of pulmonary parenchyma as well as its bold vessels. It is an unusual cause of respiratory distress in newborn. Unilateral agenesis of lung is often associated with other congenital anomalies. The condition may lead to diagnostic difficulties. Right pulmonary agenesis has poor prognosis. Here we present a case of fem...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Veterinary pathology
دوره 44 6 شماره
صفحات -
تاریخ انتشار 2007