The process of peeing is actually very complicated and involves the brain, brainstem and spine, as that very good article shows. An interruption at any point can cause tremendous problems. E, your symptoms are not typical of the older woman (>40, lol) who has had kids)
A high spinal cord lesion (above T6) can cause a person to demonstrate symptoms of urinary frequency, urgency, and urge incontinence but will be unable to empty his or her bladder completely. This occurs because the urinary bladder and the sphincter are both overactive, a condition termed detrusor sphincter dyssynergia with detrusor hyperreflexia (DSD-DH).
E - this is a good article
MS is caused by focal demyelinating lesions of the central nervous system. It most commonly involves the posterior and lateral columns of the cervical spinal cord. Usually, poor correlation exists between the clinical symptoms and urodynamic findings. Thus, using urodynamic studies to evaluate patients with MS is critical.
The most common urodynamic finding is detrusor hyperreflexia (bladder contracts too often and too forcefully), occurring in as many as 50-90% of patients with MS. As many as 50% of patients will demonstrate DSD-DH (Bladder contracts, but sphincter spasms shut not allowing the urine to pass). Detrusor areflexia (bladder muscles are weak, casuing retention and inability to empty fully) occurs in 20-30% of cases. The optimum therapy for a patient with MS and incontinence must be individualized and based on the urodynamic findings.
50% to 90% is a large chunk of us!