Anatomy Of The Nervous System Flashcards

1
Q

What sections does the corpus callousum connect?

A

Communication between parts of the brain near right and left temples

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2
Q

What is the function of the massa intermedia? What is it?

A

Cerebral commissure that connects L R lobes of diencephalon

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3
Q

What are cerebral commissures?

A

Large tracts that span the longitudinal fissure

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4
Q

What are the six primary cortexes?

A

Motor, somatosensory, gustatory (taste), auditory, visual, olfactory

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5
Q

Where does the primary somatosensory cortex receive input?

A

From the ventral posterior nucleus and from other thalamic nuclei carrying somatosensory information

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6
Q

Where is the primary somatosensory cortex located?

A

Post central gyrus

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7
Q

Where does output from the primary somatosensory cortex go?

A

To the secondary somatosensory cortex

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8
Q

What is the somatosensory homunculus?

A

Cortical map that has regions of the face depicting the amount of inputs

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9
Q

Where is the secondary somatosensory cortex located?

A

Inferior to the primary in post central gyrus

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10
Q

Where does output from the secondary somatosensory cortex go?

A

To the posterior parietal association cortex

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11
Q

What is the meninges composed of?

A

Connective tissue layer covering all of the nervous system. Dura mater, arachnoid mater, pia mater

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12
Q

What is the function of the meninges?

A

Protect, give structure, contain cerebrospinal fluid

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13
Q

What are the layers of the brain?

A

Skull, dura mater, arachnoid space, subarachnoid space with arachnoid trabeculae, pia mater, brain

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14
Q

What is the function of the subarachnoid space?

A

To contain CSF and suspend the brain in place

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15
Q

What is the function of the pia mater?

A

Secretion and containment of CSF

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16
Q

What is the function of the frontal lobe?

A

Voluntary movement, expressive language, manage higher level of executive function (plan organize, initiative, self monitor, control responses to achieve goal)

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17
Q

What is the function of the parietal lobe?

A

Processing, interpreting,somatosensory input, inform about objects in external environment, proprioception (position movement of body parts), integrates sensory input into a coordinate system to represent the world

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18
Q

What is the function of the temporal lobe?

A

Processes auditory information and encoding memory process affect emotion, language and aspects of visual perception

19
Q

Is there a dominant temporal lobe?

A

Yes, usually the left but dependent on the amount of connections made and experience

20
Q

What is the function of the occipital lobe?

A

Visual perception (color, form, motion)

21
Q

What is the function of the olfactory nerve? Is it sensory or motor? Where does it exit the brain?

A

-control smell, transmit olfactory stimuli from nose to brain
-sensory
-cerebrum

22
Q

What is the function of the optic nerve? Is it sensory or motor? Where does it exit the brain?

A

-sight. Eye to brain connection
-sensory
-cerebrum

23
Q

What is the function of the oculomotor nerve? Is it sensory or motor? Where does it exit the brain?

A

-adjust eye position/movement, pupil size
-motor
-midbrain

24
Q

What is the function of the trochlear nerve? Is it sensory or motor? Where does it exit the brain?

A

-coordinate eye super oblique muscle, eye movement and rotate
-motor
-midbrain

25
Q

What is the function of the trigeminal nerve? Is it sensory or motor? Where does it exit the brain?

A

-sensory face innervation (temp, touch, pain), chewing
-motor/sensory
-pons

26
Q

What is the function of the abducens nerve? Is it sensory or motor? Where does it exit the brain?

A

-eye muscle, lateral rectus
-motor
-pons

27
Q

What is the function of the facial nerve? Is it sensory or motor? Where does it exit the brain?

A

-facial expression muscle, salvation glands, taste inform from tongue, tear glands
-sensory and motor
-pons

28
Q

What is the function of the vestibularcochlear nerve? Is it sensory or motor? Where does it exit the brain?

A

-hearing/balance, orientation in space
-sensory
-pons

29
Q

What is the function of the glossopharngeal nerve? Is it sensory or motor? Where does it exit the brain?

A

-raise throat for swallowing, taste, monitor BP
-sensory and motor
-medulla

30
Q

What is the function of the vagus nerve? Is it sensory or motor? Where does it exit the brain?

A

-conduct signals to/from gut organs, swallowing, autonomic nervous system in response to stress
-sensory and motor
-medulla

31
Q

What is the function of the accessory nerve? Is it sensory or motor? Where does it exit the brain?

A

-neck rotation, shoulder/head movement
-motor
-medulla

32
Q

What is the function of the hypoglossal nerve? Is it sensory or motor? Where does it exit the brain?

A

-innervates intrinsic/extrinsic tongue, swallowing, speech, tongue muscles
-motor
-medulla

33
Q

What composes the cerebral cortex? Function?

A

Grey matter covering 6 layers. Composed of cell bodies. Functions in processing and cognition. White mater with axons for tracts and brain communication

34
Q

What is the neocortex? What is it composed of?

A

Composes 90% of the cortex. Part of the outer layer. Composed of pyramidal cells and stellate cells

35
Q

What are the two types of stellate cells?

A

Smooth-inhibitory
Spiny-excitatory

36
Q

What is present in the first layer of the neocortex? Molecular level

A

Few scattered cell bodies, dendrites, glial cells, spiny stellate. Inputs crucial for feedback interactions in cortex for attention and associative learning

37
Q

What is present in the external granular layer (2) of the neocortex?

A

Dense stellate and few pyramidal cells

38
Q

What is present in the external pyramidal (3) layer of the neocortex?

A

Predominately small and medium pyramidal cells. Vertically oriented cortical axons that stay within the cortex. Main target of interhemishperic cortico-cortical aference

39
Q

What is present in the internal granular (4) layer of the neocortex?

A

Dense, packed stellate cells, some pyramidal. Target of thalomocortical afference and intrahemispheric cortico-cortical afference

40
Q

What is present in the internal pyramidal (5) layer of the neocortex?

A

Large pyramidal cells that give rise to axons that leave the cortex to subcortical layers. Few, loose stellate cells

41
Q

What is present in the multiform (6) layer of the neocortex?

A

Multi size pyramidal cells, loose packed stellate. Spindle like multiform neurons. Sends efferent fibers to thalamus establishing reciprocal interconnection between thalamus and cortex

42
Q

What is white matter composed of?

A

Myelinated pyramidal cell axons, few cell bodies

43
Q

What two cortex composes the allocortex? What is the function of each of them?

A

Paliocortex- 3 layers, olfactory
Archicortex- 3 layers, survival