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AP Psychology 1.5 Sensation and Perception 20 Views
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AP Psychology 1.5 Sensation and Perception. Where do the optic nerves cross each other on their way into the brain hemispheres?
Transcript
- 00:03
And here's your shmoop du jour brought to you by optic nerves [eye balls dangling across each other]
- 00:07
crossing each other and then double crossing each other in the summers
- 00:10
biggest blockbuster eye versus eye or not. Alright here's our question where do the
- 00:17
optic nerves cross each other on their way into the brain hemispheres, here are your
- 00:22
potential answers.... Alright well there's pretty big spoiler built right into the
Full Transcript
- 00:28
question but the last time we spoiled something our buddies refuse to speak to [Guy holding a Harry Potter book and friends dressed in wizard hats]
- 00:31
us for a month well while we're running from the angry mob let's check out a
- 00:38
diagram of an eyeball alright since we're talking about optic nerves we can [diagram of inside an eye ball]
- 00:43
highlight that part of the diagram and we can see, okay weak pun, well we can see
- 00:48
that there's only one optic nerve per eye. So when we see a question asking about
- 00:53
optic nerves emphasis on nerves.. We know that whatever we're talking about isn't [Diagram of two optic nerves attached to the eye balls]
- 00:59
taking place within the eye itself with that in mind we can easily eliminate A
- 01:04
the fovea we know the fovea centralis refers to a grouping of concentrated [cones appearing out of a persons eye ball]
- 01:10
cones in the eye that are responsible for sharp central vision so we can see
- 01:14
this one through the door and since a blind spot simply refers to an area of [a plane in a cars side mirror]
- 01:18
our visual field that lacks light detecting cells on our retina and not an
- 01:23
actual physiological part of the body we can eliminate this guy too. The rest of [a dog blindfolded]
- 01:29
our answers do fit the not in our eyeball but definitely an actual
- 01:34
physiological thing criteria, funnily enough that's the scientific name for
- 01:38
these guys really you'll find out in ophthalmology school anyway we can [C and D sat in a lecture theatre]
- 01:43
eliminate one of these immediately and that's because we know that Pierre Paul
- 01:46
Broca was a 19th century French physician best known for his research in [Pierre examining a mans mouth]
- 01:50
speech production Broca's area was aptly named because it's a part of the frontal
- 01:56
lobe that is directly linked with speech production not vision that leaves us [image of Pierre's frontal lobe]
- 02:01
with the lateral geniculate nucleus and the optic chiasm but only one of these
- 02:07
guys is where the optic nerves cross each other on their way into the brain
- 02:10
hemispheres and that would be E the optic chiasm
- 02:13
who'd of thunk it right the optic chiasm right there is the space just in front [Two people dangle down a rope from hole]
- 02:19
of the pituitary gland where the optic nerves cross one another through the
- 02:23
brain on their way to the respective lobes and it's actually the only place [Two eyes meet at a dining table]
- 02:27
any parts of each eye really meet, though we here eye-harmony is coming soon and
- 02:32
there's hope for all the lonely hearts out there yet [advert for eye harmony]
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