Swallowing Function and Nutrition Assessment in Neurological Disorders

Patient Evaluation

Patients with advanced disease stages (e.g., Hoehn & Yahr stage above II), weight loss, low BMI (<20 kg/m²), drooling or sialorrhea, cognitive impairment, or signs of swallowing difficulties should have their swallowing function documented, as recommended by the American Society for Nutrition and Clinical Nutrition 1
Weight changes, BMI, and nutritional concerns should be documented in patients, as recommended by the American Society for Nutrition 1
Regular monitoring of nutritional status, body weight, and vitamin levels (particularly vitamin D, folic acid, and vitamin B12) is recommended throughout the disease course, according to the Clinical Nutrition guideline society 1

Missing dysphagia assessment in at-risk patients is associated with an increased risk of pneumonia, as reported by the American Society for Nutrition 1
Benign Paroxysmal Positional Vertigo (BPPV) is a common cause of falls in the elderly, with 53% of elderly patients with chronic vestibular disorders having fallen at least once in the past year 2
Carotid Sinus Hypersensitivity and Orthostatic Hypotension can account for up to 30% and 6-33% of unexplained syncope in the elderly, often presenting as falls, according to the American College of Cardiology 3
Medication effects, particularly in the elderly who often take multiple medications, can cause orthostatic intolerance, contributing to falls, as noted by the American College of Cardiology 3

Parkinson plus syndromes should be diagnosed when patients with parkinsonian symptoms present with specific "red flags" that are atypical for idiopathic Parkinson's disease, including early postural instability, poor response to levodopa, symmetrical onset, early autonomic dysfunction, supranuclear gaze palsy, or early cognitive impairment, as recommended by the American College of Radiology 4
The four cardinal motor symptoms of PD are: bradykinesia (slowness of movement), resting tremor (4-6 Hz tremor that decreases or disappears during voluntary movement), rigidity (increased muscle tone and resistance to passive movement), and postural instability (impaired balance and coordination) 4
Parkinsonian tremor is characterized by a rest tremor with a frequency of 4-6 Hz, asymmetric, and decreases or disappears during voluntary movement, according to the International Parkinson and Movement Disorder Society and the European Neurological Society 5, 6
PD is classified as a synucleinopathy, characterized by neuronal deposits of Lewy bodies (predominantly composed of alpha-synuclein and ubiquitin) 4

Levodopa (L-DOPA) is the most effective treatment for PD motor symptoms, crossing the blood-brain barrier and being converted to dopamine in the brain, as reported by the American College of Radiology 4
Extrapyramidal side effects of levodopa treatment include dystonia, drug-induced parkinsonism, and akathisia 7
Long-term complications of levodopa treatment include tardive dyskinesia and tardive dystonia 7
Early physical therapy intervention may help delay or prevent contracture formation in Parkinson's disease patients, although the strength of evidence for this fact is low due to lack of specific citation
Patients with long-standing Parkinson's disease (>10 years) should be monitored for early signs of contracture development, with special attention paid to those experiencing severe levodopa-induced dyskinesias, as these appear to be a significant risk factor 4

Older age at diagnosis is a risk factor for mortality in Parkinson's disease patients, according to Clinical Nutrition 1
Comorbid conditions, such as cardiovascular disease, increase the risk of mortality in Parkinson's disease patients, as reported by the American Journal of Kidney Diseases 8
Elevated systolic blood pressure, C-reactive protein levels, and low serum albumin levels are risk factors for mortality in Parkinson's disease patients, as indicated by the American Journal of Kidney Diseases 8, 9
Left ventricular mass index (LVMI) is predictive of cardiovascular death in Parkinson's disease patients, as found by the American Journal of Kidney Diseases 8
Weight loss and poor nutritional status are common in Parkinson's disease patients, with low BMI (below 20 kg/m²) being a significant risk factor, as reported by Clinical Nutrition 1