Name these GENERAL parts. (Hint: not the specific name, just what the structure or area is called)
1. longitudinal fissure
4. cerebral cortex
Name the cerebral cortex landmarks
1. suprasylvian gyrus
2. occipital gyrus
3. pseudosylvian fissure
4. sylvian gyrus
5. ectosylvian gyrus
Name the cerebral landmarks
1. cruciate sulcus
2. precruciate gyrus
3. postcruciate gyrus
Name the cerebral lobe
Name the cerebral lobes
1. Frontal lobe
2. parietal lobe
3. occipital lobe
4. temporal lobe
What are the borders of the frontal lobe?
You're doing great guys!
cruciate sulcus, postcruciate gyrus and everything rostral
What are the borders of the temporal lobe?
sylvian gyrus and ectosylvian gyrus
What are the borders of the parietal lobe?
Rostral border is postcruciate g., caudal border is straight up (dorsal) from caudal end of pseudosylvian fissure
Which gyri and lobes are associated with the primary somesthetic area?
postcruciate gyrus (frontal lobe), rostral suprasylvian gyrus (frontal lobe), ectosylvian gyrus (temporal lobe)
Which gyri and lobes are associated with the primary motor area?
postcruciate gyrus (frontal lobe), rostral suprasyvlain gyrus (frontal lobe)
Which gyri and lobes are associated with the primary auditory area?
Ectosylvian gyrus (temporal lobe)
Which gyri and lobes are associated with the primary occipital area?
Occipital gyrus, occipital lobe
- Olfactory bulb
- Medial olfactory tract
- Lateral olfactory tract
- Pyriform lobe
- optic nerve
- optic chiasm
- optic tract
Describe the histology of the olfactory epithelium
- Olfactory epithelium is outside of the skull
- Olfactory bulb is inside the skull
- Olfactory receptor cells are collecting the olfactory information (smells)
- Cell body is in the olfactory epithelium
- Olfactory cell will Projects its axons through cribriform plate and then to the olfactory bulb
- These axons make up cranial nerve 1
- Neurons of olfactory bulb send axons to piriform bulb and this is the olfactory tract
What cells project axons to the olfactory bulb?
Axons of olfactory neurons in the olfactory epithelium
Where does the optic nerve originate?
Retinal ganglion cells (in the eye)
Where does the optic tract terminate?
- Lateral geniculate nucleus of the thalamus
- Rostral colliculus of the midbrain
- Pretectal nucleus
What is the significance of the optic chiasm
- 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
- Cingulate gyrus
3- Corpus callosum
4- Rostral commisure
5- Thalamus (specifically the interthalamic adhesion at this section)
7- Mammillary nuclei
8- Optic chiasm
- Olfactory bulb
- corpus callosum
6- Optic chiasm