Week 14 worksheet Sheep brain neuroanatomy Online S20 KEY PDF

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Final result for the Sheeps brain worksheet where everything is located in the brain and what it does. Great for the final...

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NEU311L Week #14 In-Class Worksheet KEY Sheep Brain Anatomy Label below. You should also be able to describe the function, if applicable, of each of these structures.

A: (gyrus above A)_ Cingulate gyrus_________________

K:___Medulla_________________________________

B: (space)__Lateral ventricle___________________

L:___Pons____________________________________

C:_Corpus Callosum___________________________

M:__Midbrain tegmentum_______________________

D:__Fornix__________________________________

N:__Mammillary bodies of the hypothalamus_______

E:__Third ventricle_____________________________

O:___Hypothalamus____________________________

F:__Pineal body_______________________________

P:___Optic Nerve_____________________________

G:___Tectum (Superior colliculus)________________

Q:___Thalamus________________________________

H:___Cerebral aqueduct________________________

R:___Olfactory bulb____________________________

J:__Arbor Vitae of the Cerebellum_________________

Label each letter below.

H

F G C E B

A

D

K

J I A: Lobe: ______________Frontal______________________________ B: Lobe: ___________Parietal_________________________________ C: Lobe: ___________Temporal_______________________________ D: Lobe: ___________Occipital________________________________ E: Sulcus: _______Central Sulcus or Ansate Sulcus_________________ F: Gyrus: _________Primary motor cortex________________________ G: Gyrus: _________Primary Somatosensory cortex_________________ H: _____________Spinal Cord__________________________________ I: Sulcus: ______suprasylvian sulcus_______________________________ J: Sulcus: _____pseudosylvian sulcus______________________________ K: Fissure: ______Medial Longitudinal Fissure_________________________

A B C

N

D

O

M

E F

L

I

G K

H

J

A: __________Olfactory bulb______________

I:________Hippocampal gyrus_____________

B:____________Optic nerve_______________

J:_______Spinal cord_____________________

C:_______Optic chiasm____________________

K:______Medulla________________________

D:_______Optic tract___________________

L:______Pons____________________________

E:________Oculomotor___________________

M:_____Mammillary bodies_______________

F:_________Midbrain____________________

N:____Where pituitary was (infundibulum)___

G:________Trochlear_____________________

O:______Uncus________________________

H:________Abducens_____________________

#3. ______Caudate______________________________________________ #9. _______Corpus Callosum________________________________________ #10_______Putamen________________________________________ #14_______Anterior Commissure________________________________________ #15________Globus Pallidus_______________________________________ #17________Optic Chiasm_______________________________________ #18_________Lateral Ventricle______________________________________

A B C

A:_______Hippocampus__________________________________________ B:_______Lateral Geniculate Nucleus__________________________________________ C:_______Medial Geniculate Nucleus__________________________________________

Follow-up questions 1. Identify the plane of section for each of the MRI images shown below. A

B

C

D

A:_______Horizontal__________________________ B:________Mid-Sagittal_________________________________ C:_______Frontal______________________________ D:________Horizontal_________________________________

2. Complete each sentence with the appropriate directional term.

a. The occipital lobe is _____ caudal/posterior _________________ to the parietal lobe.

b. The pons is ______ rostral/anterior _________________________ to the medulla.

c. The optic chiasm is _____ medial ____________________________ to the uncus.

d. The hippocampal gyrus is ____ lateral___________________________ to the mammillary bodies.

e. The optic nerve is _______ ventral ______________________ to the primary motor cortex.

f.

The frontal lobe is ___ dorsal________________________ to the olfactory bulbs.

3. Which areas of the brain are organized like a homunculus? Based off the homunculus, which areas of the body are most sensitive?

Primary motor cortex and primary somatosensory cortex. Most sensitive areas: face, hands/fingers (anything enlarged on the somatosensory homunculus)

4. Multiple Sclerosis is an autoimmune disorder that occurs when the immune system attacks the myelin sheath of axons. Some of the first areas of the brain affected are the optic tracts and the cerebellum. Based off this knowledge, what symptoms would you expect an individual to first display?

Visual problems (optic nerve), balance problems (cerebellum), fine motor coordination problems (cerebellum)

5. A patient arrives at the ER and is suffering from an ischemic stroke (blockage of a blood vessel in the brain) that has caused a loss of blood perfusion to certain areas of the brain. The main symptom that brought the patient into the ER was severely slurred speech. In what area of the brain do you hypothesize the stroke took place? In what hemisphere did the stroke occur? Site of stroke: Broca’s area (motor production of speech) Broca’s area is only found within the left hemisphere, so the stroke occurred in the left hemisphere.

6. A certain genetic mutation causes a disruption in the wiring of the optic chiasm, specifically, a decrease in the crossing of the nerves at the optic chiasm (common in cats). These cats are still able to function normally by crossing their eyes. Why do they have to make this behavioral change?

This requires that students revisit the decussation of the optic nerves at the optic chiasm. Due to the lack of crossing at the chiasm, the cats need to cross their eyes in order to see the outer portion of their visual fields....