Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.
Elephant and Human Brains... COMPARED
Transcript of Elephant and Human Brains... COMPARED
and elephants have larger
brains then ants. -then this would have to also apply with other species ex. cows have a larger brain than monkeys, but are less cognitively capable than most, if not all, primates. Cognition: Of or pertaining to the mental process of perception, memory, and judgement as contrasted with emotion & volitional process Myth #2: Human brains are largest relative to body size. -In 335BC, Aristotle said that the
relation of brain size to intelligence
is about ratio of brain weight to body
weight -Humans brain-to-body ratio is huge
compared to elephants (about 1/40 vs
1/560 respectively) -Equal to that of a mouse though
which is also 1/40 -Is smaller than that of some small birds (1/12) Myth #3: A bigger briain has more
neurons than a smaller one -The assumption that the density of the brain is more or less constant across various animals is false -Herculano-Houzel's study shows different mammals follow different "scaling rules" -Elephant brains are more dense than human brains despite being smaller in comparison with body weight elephant brain human brain has more neurons per tsp Neurons &
Herculano's Study Temporal Lobe: Generally related to hearing in mamals, and speech in humans. Where we hold memory. Is more developed in elephants. -Neurons have tree-like branches that intertwine with those of their neighbours -They form the vast electrical &
chemical network that is our brain. -They control subconscious bodily
functions -2009, Herculano liquified 4 mens brains using "isotropic fractionation" technique -Counted neurons in small sample, then multiplied it by the size of whole brain -Discovered average of 86 billion neurons in humans -Elephants: 23 billion
-Rats: 56 billion
-Mice: 75 billion Cerebellum: Relates muscle coordination; trunk coordination directly related to cerebellum. 3 enlargements compared to humans: Olfactory lobe: Connected to fine innervation of sense of smell in trunk. Temporal lobe
of cerebrum Cerebellum Infrasound -Low frequency, under 16Hz (hertz) -Humans can't hear it (can hear down to 20Hz) -Recently discovered that is how elephants communicate -can send signals 20km because unlike human sounds, it doesn't shatter, and it can bend and go around obstacles -Emitted from storms & volcano eruptions von Economo Neuron Cells -Study conducted on elephant brain shows spindle-shaped cells called von Economo neurons -Only found in intelligent mammals such as humans, apes, elephants, and a few others -Located in anterior cingulate cortex, are elongated with only one dentrite (recieve signals) at each end -4 times bigger than other cells in brain -Help with sensations such as pain, hunger, and for recognizing when one has made a mistake -Humans have roughly half a million (1.25% more than elephants)