Answer:
Cerebellum
Step-by-step explanation:
Spinocerebellar degeneration -
It refers to some degenerative alterations in the cerebellum of the brain , and even in the spinal cord , is referred to as the condition of Spinocerebellar degeneration .
In the very initial phase of this disease , the person faces difficulty in walking and feels slight tremors , which can grow with time if left untreated .
And person can not able to stand or walk .
Hence , from the given scenario of the question ,
Jennifer is suffering from Spinocerebellar degeneration , and it has affected the cerebellum of the brain .