Following are the possible causes of balance and incoordination problem;
1) Sitting balance and arising from chair problem; proximal muscle weakness, arthritis, or neurologic disease are the causes. Treatment is muscle-strengthening exercises, and treatment of specific conditions, such as arthritis.
2) Neck turning and extension; Neck arthritis (cervical arthritis, cervical spondylosis), or vertebral-basilar insufficiency can cause this. Treatment options include avoidance of quick head-turning and physical therapy.
3) Standing balance; causes are orthostatic hypotension, cerebellar disease, sensory deficits, muscle weakness, or pain. Treatments are muscle strengthening, using an assistive device, improved foot care, medication adjustment, and treatment of specific diseases.
4) Unstable turning around; causes to consider are cerebellar disease, hemiparesis (stroke), visual field cut, or reduced proprioception (sensation). Treatment possibilities are assistive devices, proper shoes and gait training.
5) Unsafe sitting down; may have proximal muscle weakness or poor vision. Treatment options include muscle strengthening, raising the height of the seat, and visual assessment.
He would need a neurological assessment and following investigations;
a) Muscle charting for the muscle strength
b) MRI of the brain and spine
d) Blood work like CK which is a muscle enzyme.
Treatment had been discussed above and is dependent on the diagnosis. Mainstay of the treatment is physical therapy.
Memory changes are due to age and short term memory is affected by aging.
Please feel free for your follow up questions.