【名词&注释】
临床表现(clinical manifestation)、审美活动(aesthetic activity)、甲状腺下动脉(inferior thyroid artery)
[多选题]颈外动脉发出的分支有 ( )
A. 面动脉
B. 舌动脉
C. 甲状腺下动脉
D. 脑膜中动脉
E. 颞浅动脉
根据以下内容,回答下面的题目。Researchers have found that REM (rapid eye movement) sleep is important to human beings.This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence.The deeper a person’s sleep becomes, the longer the periods of rapid eye movement.There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep.Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly.Accompanying these physical changes in the body is a very important characteristic of REM sleep.It is during REM sleep that a person dreams.According to the passage, how often does REM sleep occur in one night?