They may struggle to hide them. Probably the most common early sign is short-term memory loss.

VOA: special.2011.02.08

Well, there I might be factoring in the frontal lobe because much of the short-term memory in particular is in the frontal lobe.

那么,额叶会发挥作用,因为大部分的短期记忆,都由额叶进行处理

耶鲁公开课 - 聆听音乐课程节选

Probably the most common early sign is short-term memory loss.

VOA: special.2009.09.15

Because his long-term memory is better than his short-term memory, Bordisso moved back to his childhood home in Sacramento, California.

CNN: In early Alzheimer's, work is possible with support

The young actor Joseph Gordon-Levitt, who looks a little like Keanu Reeves, only smarter, is Chris Pratt, a Midwestern high-school jock and rich kid who hurt his head in a car accident (it was his fault) and now suffers from short-term-memory loss.

NEWYORKER: The Lookout

Mr. LEAHY: He has cognitive problems - severe cognitive problems that include significant memory loss, particularly profound short-term memory problems.

NPR: Former NFL Players Unable to Pay Medical Bills