Final answer:
The common manifestation of vitamin B1 (thiamine) deficiency is Beriberi, which includes symptoms such as nervous system issues, edema, and cardiovascular changes.
Step-by-step explanation:
Vitamin B1, also known as thiamine, is essential for energy metabolism and the functioning of the nervous system. A deficiency in vitamin B1 can lead to a condition known as Beriberi, which presents through various symptoms such as polyneuritis, edema, cardiovascular changes, and muscular atrophy.
Beriberi can be classified into different forms including Dry Beriberi, where nervous system symptoms predominate, and Wet Beriberi, characterized by edema and congestive heart failure. Acute cases, especially seen in alcoholics, can lead to Wernicke's encephalopathy, a severe brain disorder. Furthermore, infants breastfed by mothers deficient in thiamine can develop infantile Beriberi.