Lab 1

Question 2

Name these GENERAL parts. (Hint: not the specific name, just what the structure or area is called)

Answer 2

1. longitudinal fissure
2. sulcus
3. gyrus
4. cerebral cortex
5. sulcus
6. gyrus

Question 3

Name the cerebral cortex landmarks

Answer 3

1. suprasylvian gyrus
2. occipital gyrus
3. pseudosylvian fissure
4. sylvian gyrus
5. ectosylvian gyrus

Question 4

Name the cerebral landmarks

Answer 4

1. cruciate sulcus
2. precruciate gyrus
3. postcruciate gyrus

Question 5

Name the cerebral lobe

Answer 5

Piriform Lobe

Question 6

Name the cerebral lobes

Answer 6

1. Frontal lobe
2. parietal lobe
3. occipital lobe
4. temporal lobe

Question 7

What are the borders of the frontal lobe?

You’re doing great guys!

Answer 7

cruciate sulcus, postcruciate gyrus and everything rostral

Question 8

What are the borders of the temporal lobe?

Answer 8

sylvian gyrus and ectosylvian gyrus

Question 9

What are the borders of the parietal lobe?

Answer 9

Rostral border is postcruciate g., caudal border is straight up (dorsal) from caudal end of pseudosylvian fissure

Question 10

Which gyri and lobes are associated with the primary somesthetic area?

Answer 10

postcruciate gyrus (frontal lobe), rostral suprasylvian gyrus (frontal lobe), ectosylvian gyrus (temporal lobe)

Question 11

Which gyri and lobes are associated with the primary motor area?

Answer 11

postcruciate gyrus (frontal lobe), rostral suprasyvlain gyrus (frontal lobe)

Question 12

Which gyri and lobes are associated with the primary auditory area?

Answer 12

Ectosylvian gyrus (temporal lobe)

Question 13

Which gyri and lobes are associated with the primary occipital area?

Answer 13

Occipital gyrus, occipital lobe

Question 14

1?

2?

3?

4?

Answer 14

1. Olfactory bulb
2. Medial olfactory tract
3. Lateral olfactory tract
4. Pyriform lobe

Question 15

1

2

3

4

Answer 15

1. eye
2. optic nerve
3. optic chiasm
4. optic tract

Question 16

Describe the histology of the olfactory epithelium

Answer 16

1. Olfactory epithelium is outside of the skull
2. Olfactory bulb is inside the skull
3. Olfactory receptor cells are collecting the olfactory information (smells)
4. Cell body is in the olfactory epithelium
5. Olfactory cell will Projects its axons through cribriform plate and then to the olfactory bulb
6. These axons make up cranial nerve 1
7. Neurons of olfactory bulb send axons to piriform bulb and this is the olfactory tract

Question 17

What cells project axons to the olfactory bulb?

Answer 17

Axons of olfactory neurons in the olfactory epithelium

Question 18

Where does the optic nerve originate?

Answer 18

Retinal ganglion cells (in the eye)

Question 19

Where does the optic tract terminate?

Answer 19

3 nuclei

1. Lateral geniculate nucleus of the thalamus
2. Rostral colliculus of the midbrain
3. Pretectal nucleus

Question 20

What is the significance of the optic chiasm

Answer 20

• The 2 optic nerves join here.
• 25% of the temporal retina do not decussate at the optic chiasm, but instead join the ipsilateral optic tract
• However axons from the remaining retina decussate at the optic chiasm to enter the contralateral optic tract

Question 21

1

2

Answer 21

1. Cingulate gyrus
2. Septum

Question 22

3

4

Answer 22

3- Corpus callosum

4- Rostral commisure

Question 23

5

6

Answer 23

5- Thalamus (specifically the interthalamic adhesion at this section)

6- Hypothalamus

Question 24

7

8

Answer 24

7- Mammillary nuclei

8- Optic chiasm

Question 25

1 2 3

Answer 25

1. Cerebrum 2. Olfactory bulb 3. corpus callosum

Question 26

4 5

Answer 26

4- Thalamus 5- Hypothalamus

Question 27

6 7

Answer 27

6- Optic chiasm 7- Hypophysis