| 查看: 988 | 回复: 7 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
Everyday News-Ostriches Are Stealth Sleepers
|
|||
|
Contrary to popular belief, ostriches don't sleep with their heads in the sand. In fact, to all appearances, they never sleep at all: their eyes stay open, although they appear to doze off from time to time. To learn more about the sleep patterns of this unusual bird, researchers captured six ostriches in South Africa and measured their brain wave patterns with data loggers while they slept They expected the brain waves to look like those of other birds and mammals, which cycle between two patterns: deep sleep and rapid eye movement (REM). When the loggers showed that the ostriches were in deep sleep, the birds looked entirely alert. But when they entered another sleep cycle, their heads started to droop. This second brainwave pattern wasn't classic REM, but a unique hybrid of REM and deep sleep patterns, the researchers report this week in PLoS ONE. The only other animal to show this pattern is the platypus, a member of an ancient group of egg-laying mammals known as monotremes. As ostriches are an ancient type of bird, this similarity suggests that the separation between REM and deep sleep may have evolved recently in birds and mammals. One can only speculate on whether ostriches and platypuses have similar dreams, too. Video: http://bcove.me/822crygl [ Last edited by lion1998 on 2011-9-19 at 07:13 ] |
回复此楼» 猜你喜欢
求调剂
已经有3人回复
-
265求调剂
已经有4人回复
-
085700资源与环境308求调剂
已经有6人回复
-
一志愿吉林大学材料学硕321求调剂
已经有12人回复
-
286分人工智能专业请求调剂愿意跨考！
已经有3人回复
-
329求调剂
已经有5人回复
-
申请回稿延期一个月，编辑同意了。但系统上的时间没变，给编辑又写邮件了，没回复
已经有4人回复
-
材料学硕318求调剂
已经有5人回复
-
一志愿中国海洋大学，生物学，301分，求调剂
已经有6人回复
-
081700化工学硕调剂
已经有3人回复
宝贝NO1
木虫 (著名写手)
金牌世尊
- 应助: 29 (小学生)
- 金币: 1456.1
- 散金: 2061
- 红花: 5
- 沙发: 28
- 帖子: 1570
- 在线: 140.4小时
- 虫号: 1308269
- 注册: 2011-05-27
- 专业: 传热传质学
4楼2011-09-19 07:58:10
fengxinzi321
木虫 (著名写手)
豆豆
- 应助: 18 (小学生)
- 金币: 1750.4
- 散金: 58
- 红花: 9
- 帖子: 1463
- 在线: 156.7小时
- 虫号: 1288256
- 注册: 2011-05-07
- 性别: MM
- 专业: 药物化学
5楼2011-09-19 09:10:10
 |
6楼2011-09-19 11:02:55
8楼2011-09-19 21:47:51
