Featured Research

from universities, journals, and other organizations

Living Fossils Have Long- And Short-term Memory Despite Lacking Brain Structures Of Modern Cephalopods

Date:
June 1, 2008
Source:
The Journal of Experimental Biology
Summary:
Nautilus, the ancient living ancestors of modern cephalopods, have both long and short-term memory, despite lacking the brain structures that modern cephalopods evolved for long-term memory.

Nautilus, the ancient living ancestors of modern cephalopods, have both long and short-term memory, despite lacking the brain structures that modern cephalopods evolved for long-term memory.
Credit: iStockphoto/Dmitry Rukhlenko

Robyn Crook from the City University of New York reports that Nautilus, the ancient living ancestors of modern cephalopods, have both long and short-term memory, despite lacking the brain structures that modern cephalopods evolved for long-term memory.

Related Articles


Nautiloids are the sole surviving family of externally-shelled cephalopods that thrived in the tropical oceans 450--150 million years ago. However, in the intervening years their modern soft bodied relatives dumped the shell and developed complex central nervous systems; which makes Nautilus ideally suited to discover the 'evolutionary pathways that led to the development of the complex coleoid [soft bodied cephalopod] brains' say Robyn Crook and Jennifer Basil. Knowing that the simple Nautilus brain lacks the structures required for memory in more sophisticated cephalopods, Crook and Basil decided to test the living fossil's memory.

Training Nautilus pompilus to associate the smell of food with a blue light, the cephalopods eventually learned to respond to a flash of blue light by extending their tentacles. Then the scientists tested the cephalopods memories with a flash of light 3min, 30min, 1h, 6h, 12h and 24h after training. Amazingly, Nautilus remembered their training for up to an hour before the memory was lost, but then the memory returned 6h later, lasting up to 24h. Nautilus has both short and long term memory, just like modern cephalopods, despite lacking the same brain structures.

Crook and Basil are optimistic that the unsophisticated Nautilus brain could teach us how modern cephalopod brains evolved.


Story Source:

The above story is based on materials provided by The Journal of Experimental Biology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Crook, R. and Basil, J. A biphasic memory curve in the chambered nautilus, Nautilus pompilius L. (Cephalopoda: Nautiloidea). Journal of Experimental Biology, 2008; 211 (12): 1992-1998 DOI: 10.1242/jeb.018531

Cite This Page:

The Journal of Experimental Biology. "Living Fossils Have Long- And Short-term Memory Despite Lacking Brain Structures Of Modern Cephalopods." ScienceDaily. ScienceDaily, 1 June 2008. <www.sciencedaily.com/releases/2008/05/080531074905.htm>.
The Journal of Experimental Biology. (2008, June 1). Living Fossils Have Long- And Short-term Memory Despite Lacking Brain Structures Of Modern Cephalopods. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2008/05/080531074905.htm
The Journal of Experimental Biology. "Living Fossils Have Long- And Short-term Memory Despite Lacking Brain Structures Of Modern Cephalopods." ScienceDaily. www.sciencedaily.com/releases/2008/05/080531074905.htm (accessed January 25, 2015).

Share This


More From ScienceDaily



More Mind & Brain News

Sunday, January 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Smart Wristband to Shock Away Bad Habits

Smart Wristband to Shock Away Bad Habits

Reuters - Innovations Video Online (Jan. 23, 2015) — A Boston start-up is developing a wristband they say will help users break bad habits by jolting them with an electric shock. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Amazing Technology Allows Blind Mother to See Her Newborn Son

Amazing Technology Allows Blind Mother to See Her Newborn Son

RightThisMinute (Jan. 23, 2015) — Not only is Kathy seeing her newborn son for the first time, but this is actually the first time she has ever seen a baby. Kathy and her sister, Yvonne, have been legally blind since childhood, but thanks to an amazing new technology, eSight glasses, which gives those who are legally blind the ability to see, she got the chance to see the birth of her son. It&apos;s an incredible moment and an even better story. Video provided by RightThisMinute
Powered by NewsLook.com
One Dose, Then Surgery to Test Tumor Drugs Fast

One Dose, Then Surgery to Test Tumor Drugs Fast

AP (Jan. 23, 2015) — A Phoenix hospital is experimenting with a faster way to test much needed medications for deadly brain tumors. Patients get a single dose of a potential drug, and hours later have their tumor removed to see if the drug had any affect. (Jan. 23) Video provided by AP
Powered by NewsLook.com
The Best Bedtime Rituals For a Good Night's Sleep

The Best Bedtime Rituals For a Good Night's Sleep

Buzz60 (Jan. 22, 2015) — What you do before bed can effect how well you sleep. TC Newman (@PurpleTCNewman) has bedtime rituals to induce the best night&apos;s sleep. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins