Quiz 1

Question 1

Dorsal is aka

Answer 1

aka synonymous with POSTERIOR and SUPERIOR

means on or toward the back of, in reference to brain nuclei, located above

Question 2

Ventral aka

Answer 2

synonymous with “ANTERIOR” and “INFERIOR”

(on or towards the belly or side of the animal which the belly is located or, in reference to the brain, located BELOW aka inferior aka bottom of brain)

Question 3

Rostral

Answer 3

means “toward the beak” or located toward the front.

front of brain/towards nose

Question 4

Caudal

Answer 4

located near or towards the tail or end

back of brain, or basically the spinal chord in the brain bc brain turns at base

Question 5

Rostral-Caudal axis

Answer 5

longitudinal neuroaxis, is the long axis of the body from nose to tail

Question 6

dorsal-ventral axis

Answer 6

perpendicular to longitudinal axis from back to front or abdomen.

Question 7

name the different Planes/sections/cuts of the brain (just name the 3)

Answer 7

horizontal,
coronal
sagittal

Question 8

Horizontal plane (describe it)

Answer 8

this is parallel to the longitudinal axis from one side to the other. Splits into dorsal and ventral portions.

(is horizontal to the floor. like cuts the top half of head from bottom half of head)

Question 9

Coronal (aka transverse) plane (Describe it)

Answer 9

is perpendicular to longitudinal axis between dorsal and ventral surfaces. splits anterior and posterior portions
(cuts from ear to ear, like a crown.)

Question 10

sagittal plane (describe it)

Answer 10

Parallel to longitudinal axis and midline from dorsal and ventral surfaces. splits into left, right portions

(splits head from left to right and across… goes down the nose line so can see left hemisphere only or right hemisphere only )

Question 11

Midsagittal plane (describe it)

Answer 11

midline, divides into symmetrical halves

Question 12

parasagittal plane (describe it)

Answer 12

off the midline to the side.

Question 13

Ipsilateral

Answer 13

on the same side

Question 14

contralateral

Answer 14

on opposite side

Question 15

afferent

Answer 15

information coming into brain or part of brain

Question 16

efferent

Answer 16

information leaving brain or part of the brain

Question 17

Nerve

Answer 17

bundle of axons OUTSIDE of CNS

Question 18

Tract

Answer 18

Bundle of axons INSIDE of CNS

Question 19

Tract is also known as what?

Answer 19

aka pathway, fasciculus, peduncle, lemniscus. but is only really interchangeable with pathway, the others are dependent on the actual name of the area being discussed

Question 20

how do you name a tract?

Answer 20

named by starting point and ending point.

Question 21

Nucleus

Answer 21

is a cluster of cell bodies INSIDE CNS (in gross anatomy) where DNA is located (in microscopic anatomy/cell anatomy).

Question 22

Ganglion

Answer 22

is a cluster of cell bodies OUTSIDE the CNS

Question 23

Know the functional principles. such as:

Principle #1: The nervous system’s function is to produce a response within a perceptual world created by the brain.

Answer 23

START/FINISH

Question 24

Functional Principle #2: The nervous system is constantly changing, an attribute called neuroplasticity

Answer 24

Neuroplasticity- the idea that the brain can change. We’re born with certain neurons, and then dependent of experience and nature/nurture, those neural systems are contstantly changing via pruning, etc.

Question 25

``` Principle 3: Brain circuits generally are crossed. visual is.... somatosensory is..... auditory is..... olfactory is.... ```

Answer 25

visual and somatosensory are both crossed. auditory is mainly crossed, but some ipsilateral. olfactory is NOT crossed. He wont test us on whether cranial nerves are not crossed except on IV…

Question 26

Principle #4: CNS functions on multiple levels. As animals evolve, new structures are added to refine functions of older structures. Older structures are not replaced, but integrated with newer ones.

Answer 26

The brain stem is super old, then above that is the limbic or reptillian brain. Then above that is the amygdala, which is where fear and fight and flight response is. Its important to understand this bc sometimes our pts responses are reactive. They are responding bc their brain is wired that way. But this doesn’t mean that the cortex cant overlay or overcome those fear conditioning circuits. You will never forget the trauma, those tracks will remain, but you CAN help them have different responses than what they are.

Question 27

Principle #5: The brain is symmetrical & asymmetrical. | Both anatomically & functionally

Answer 27

Left and right hemispheres arent symmentrical. The right hemisphere is actually a little bit larger, and they function extremely different. But if you look at the thalamus, and the various structures inside the different portions of the thalamus, then you will see that they are almost the same. And that is symmetrical.

Question 28

Principle #6: Brain systems are organized hierarchically and in parallel. Are multiple, parallel, hierarchically-organized (serial) pathways

Answer 28

What we mean by hierarhical is that they are serial. That A sends to B, B then sends to C, C to D, D to E and so on. ``` Also for hierarchical: so you may have 15 nuerons, each sending info up to 5 neurons, which then send up to 2 nuerons. So the 2 neurons are receiving info technically from all 15 neurons, but those 2 neurons are privy to all of the information from all of the neurons bc of the hierarchical organization. Think pyramid. For parallel, processing, multiple systems or circuits may be rcessing different information at the same time. an example might be that one module in your brain is processing a person holding an object, while another module/circuit is processing that it’s a green object, while another module is processing that the pen is MOVING. But we don’t proces that in a heirarchy- instead these systems are procesing and operating simultaneously and we perceive it as one unified thing. There are certain modules processing for certain kinds of task. ```

Question 29

Principle #7: Sensory & motor divisions occur throughout the nervous system.

Answer 29

There are systems specialized for receiving sensory information, while others are specilized for receiving information about information about a movie object.

Question 30

Principle #8: Sensory input to the brain is divided for recognizing objects and controlling movements.

Answer 30

Dorsal pathway processes that an object is moving or WHERE it is. WHAT an object is or recognizing an object is happening in ventral pathway

Question 31

Principle #9: Functions are both localized & distributed (depending on degree of specificity). Modules perform highly specialized functions. Modules work together for higher-level function.

Answer 31

So comprehending spoken language is a different part than a part of brain responsible for speaking or communicating (language)

Question 32

Principle #10: The nervous system works through excitation & inhibition. Damage to excitatory instructions can cause loss of behaviors. Damage to inhibitory instructions Injury can cause release of behaviors.

Answer 32

What this means: neuron a can excite neuron B (make it more likely to fire) or inhibit (make less likely to fire). This gets complicated if you have certain neurons that are damaged early on in the process- like those neurons picking up photostimuli, or damage to the excitatory neurons, can cause a loss of behaivors.

Question 33

Principle #11: Information is processed in sequence of “in – integrate – out.” Incoming information is summed & transformed while being integrated, leading to new, created information. At level of neuron or at higher levels Consciousness may be the ultimate form of integration.

Answer 33

A lot of our information is actually processed subconsciously- like you don’t think you have to move your feet when walking and talking with a friend. And the ultimate example of integration is consciousness.

Question 34

Principle #12: CNS modulates basic excitation & inhibition via neuromodulators (neurotransmitters). One neuron can modulate internal biochemistry (even gene expression) of another.

Answer 34

Principle #12: CNS modulates basic excitation & inhibition via neuromodulators (neurotransmitters). One neuron can modulate internal biochemistry (even gene expression) of another.

Question 35

Principle #13: Neurons with basically similar properties can produce very different actions due to the way they are connected with each other and with receptors and end organs. Hence, the critical importance of understanding neuroanatomy

Answer 35

Principle #13: Neurons with basically similar properties can produce very different actions due to the way they are connected with each other and with receptors and end organs. Hence, the critical importance of understanding neuroanatomy

Question 36

Name the major classification groups for techniques

Answer 36

electrophysiological testing

Question 37

Single-Cell Microelectrode:

Answer 37

Placed on single neurons gives insight into function Single neuron that responds only to head direction Single neuron that responds only to line segment with certain orientation Single neuron that responds only to a specific human face SUPER Small electrode that can be placed on a single neuron. Found that a single neuron can respond to only head direction, or only line segnment… there are specific neurons for specific things… like a moving object versus a moving line versus line, etc. So with the single neuron that responds to only one face: its bc there are neurons that are at the top of that hierarchy, which in turn means that they are actually receiving all of the information up the ladder form TONS of neurons.

Question 38

Electrical cortical stimulation mapping

Answer 38

Provides insights, but is invasive and usually limited to animals & surgical pts What areas of the brain do what…. By stimulating certain neurons, (like playing a certain sound or seeing certain face) they could map out the brain

Question 39

Wada test

Answer 39

Amobarbital injected into carotid artery disrupts ipsilateral cognitive functioning (usually language is tested). Uses are similar to those of electrical cortical stimulation mapping Wada test is a neuropsych test- they inject amobarbital into the artery (like right carotid artery), which serves a certain part of the brain (The right hem of brain), and it stops those neurons from functioning. This is usually done in epilepsy patients to be sure that they arent giong to damage a certain portion of the temporal lobe (like their ability to speak, area for language) when they go in and do the surgery to remove certain portions of brain….

Question 40

Neuropsychology –

Answer 40

Usually, the study of the above (of behavioral neuroscience), but in humans Especially in the case of Clinical Neuropsychology

Question 41

“Behavioral Neuroscience” –

Answer 41

The study of brain-behavior relationships, how brain function relates to thoughts, emotions and behavior. The biological foundations of behavior