Read Next

The Keshik Feigned Retreat Ambush

When you travel through a dangerous country, you're generally safe if you're self-aware and vigilant, and generally unsafe if you're unaware and distracted.

I was in the Philippines for four days recently, and I generally had my awareness high.

Except for my last night there.

For whatever reason, when you're about to leave somewhere and nothing bad has happened, it's easy to lapse in awareness. I was exhausted at the end of the trip, as I'd done a bunch of tedious administrative work with an intense focused effort on getting it done, and I'd been doing some mental training at the same time to increase my focus, ability to stay focused and single-mindedness.

And it had all gone well.

Lab 3: Embryonic development and coronal dissections

On Daniell's Brain and Behavior Lab Blog

Can you believe the strange figure above will develop into a fully functioning human in a few months? The strange looking figure above is an embryo. Embryonic development consist of many changes and developments. During the fourth week of pregnancy the embryonic brain is visible. Three swellings are also visible at this time. Theses swellings are the Forebrain, midbrain and the hindbrain. A week after the embryonic brain is visible, these three swellings then develop into five swellings: Telencephalon, Diencephalon, Mesencephalon, Metencephalon, and Myelencephalon. The forebrain develops into the Telencephalon and Diencephalon. The midbrain stays the same but is now called the Mesencephalon. Lastly the hindbrain develops into the Metencephalon and Myelencephalon.

In brain and behavior lab we discussed which of the previously studied structures of the brain are found in the correct division of the brain. The four lobes of the brian, frontal, parietal, occipital, and temporal, in addition to the pyriform cortex olfactory bulb and cingulate cortex are apart of the forebrain. The midbrain consist of structures such as the mammillary body, third ventricle, thalamus, lateral ventricles, and hypothalamus. Lastly the hindbrain consist of the medulla, pons, cerebellum, cerebral aqueduct, cerebral peduncle, and the forth ventricle. This review part of the lab was very helpful in grouping the previously learned structures to the the 3 divisions of the brain.

Next we did coronal dissections on the brain. We cut three slices on one of our midsagital sheep brain piece. The sheep brain was fairly easy to cut through but once we got to the 3rd cut , through the superior colliculus and the cerebral aqueduct rostral to the pons, the brain began to fall apart. Though this lab wasn’t messy, the brain falling apart wasn’t a pleasant slight. The three dissections helped us see previously learned structures such as the corpus callosum, optic chiasim, ventricles, and so forth from a coronal point of view.

This hands on experience was very beneficial because it helped me notice that different structures of the brain look different from different point of views. Initially it was a bit difficult for me to locate different structures from the coronal point of view because I wasn’t use to looking at structures from this point of view. Despite this initial obstacle, this lab was very informative and successful!

Rendering New Theme...