If a neurosurgeon stimulated your right motor cortex, you...

Key Concepts

Motor Cortex

The motor cortex is a region in the brain that plays a crucial role in planning, controlling, and executing voluntary movements by sending neural signals to various parts of the body.

Contralateral Control

Contralateral control is a principle where each hemisphere of the brain governs movement on the opposite side of the body, meaning stimulation of one hemisphere typically results in movement on the opposite side.

Somatotopic Organization

Somatotopic organization refers to the arrangement of the motor cortex where different regions correspond to specific body parts, allowing precise mapping between cortical areas and bodily movements.

Transcript

0:00 All right.

00:01 So this question is asking if a neurosurgeon stimulated your right motor cortex, you would most likely, a, c, light, b, hear a sound, c, feel a touch on the right arm, or d, move your left leg.

00:16 All right.

00:16 So this question is really getting at your understanding of the cortexes.

00:20 And it's a really good introduction to the hemispheres on general lobes of the brain.

00:26 So here they're asking for what happens when your right motor cortex is stimulated.

00:32 And looking at our options given, i'm seeing a and b and thinking immediately that those can't be the right answer because of the sort of function that they are, that they're explaining and how it's connected to the parts of the brain.

00:47 So when we're talking about seeing things and hearing things, we know that our sense of sight and our sense of hearing are more.

00:58 It's a sensory sort of thing.

01:01 That's not to say that feeling a touch or moving something isn't sensory.

01:08 It's more so that seeing and hearing are given their own little sort of cortex within the brain that isn't a motor function.

01:15 And i want you to think of motor functions to think of some sort of movement, hence motor.

01:22 So seeing and hearing would most likely be caused by stimulation in the somato sensory cortex.

01:40 You could almost say the same thing about feeling the touch in the right arm, but i want to use that in getting to the right answer in a different explanation...

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