Sheep brain midsagittal view

Sheep brain midsagittal view is a printable worksheet available for download here so you can take the quiz with pen and paper. This is an online quiz called midsagittal view sheep brain. You can use it as midsagittal view sheep brain practice, completely free to play. Close menu PurposeGames PurposeGames.

Roger N. Morrissette, PhD. Brain Dissection Lab. By the end of this laboratory you should be able to do the following:. Identify all regions of the dorsal surface of a sheep brain.

Sheep brain midsagittal view

The mid-sagittal cut is a straight forward dissection. Remove the pituitary gland. Turn the brain over. Align your knife or razor by placing it in the longitudinal fissure between the two hemispheres. Using smooth sawing motions, cut your brain in half. We begin our study of the mid-sagittal cut with the massa intermedia 25 , the point at which the two halves of the thalamus join across the midline. This joining is not seen in all mammals, or even within all individuals of a species. In humans for instance, only one third of the population has this joining. Dorsal to the massa intermedia is the fornix Above the fornix, in our picture, is one of the lateral ventricles 8. It happens to be the left lateral ventricle. There are a total of four ventricles in the brain.

Slightly more dorsal to this, hidden in the depth is a glimpse of the hippocampus

Created on April 20, Cerebrum Performs higher functions like interpreting touch, vision and hearing, as well as speech, reasoning, emotions, learning, and fine control of movement. Corpus Callosum Connects the left and right hemisphere and ensures hemispheres can communicate with one another. Hypothalamus Plays a role in controlling behaviors such as hunger, thirst, sleep, and sexual response. Also regulates body temperature, blood pressure, emotions, and secretion of hormones. Performs many automatic functions like breathing, heart rate, body temperature, wake and sleep cycles, digestion, sneezing, coughing, vomiting, and swallowing.

The sheep brain is remarkably similar to the human brain. One major difference, however, is in proportion. For example, the sheep brain has a proportionately smaller cerebrum. Another difference is in orientation of the spinal cord. The sheep spinal cord is orientated anterior to posterior, as in any four-legged animal. The human spinal cord is orientated superior to inferior. This orientation difference has a major affect on the location of the brain stem. The sheep brain stem is located more towards the rear posteriorly. The sheep skull, in order to compensate for this, has the foramen magnum located more towards the rear of the skull. In humans, since we walk upright bipedalism , the spinal cord is in a more vertical plane, thus the foramen magnum is located centrally on the bottom of the skull inferiorly.

Sheep brain midsagittal view

The sheep brain anatomy consists of 3 major parts — prosencephalon forebrain , mesencephalon midbrain , and rhombencephalon hindbrain. These 3 main parts of the sheep brain again divide into specific segments. There are also 5 different lobes in the sheep brain structure — frontal, parietal, occipital, temporal, and limbic area. The different anatomical features of the dorsal, ventral, and lateral aspects of the sheep brain make it complex. But, I will make it so simple for you that you may easily identify all the anatomical features of the sheep brain. Here, I will describe all the 3 major parts and their sub-parts from the sheep brain anatomy with the labeled diagram. I will show you the ventricular system of the sheep brain along with the course of cerebrospinal fluid CSF.

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Above the fornix, in our picture, is one of the lateral ventricles 8. We have already mentioned the superior colliculus 3 , concerned with vision, and right below it is the inferior colliculus 4 , concerned with hearing which lies right above the cerebral aqueduct. Identify each region in the midsagittal section below. We also see, below the cerebellum, the pons 24 , which is formed by massive fibre bundles on their way to the cerebellum from the brain. R egion or Nerve Function. Take your time, use the diagrams below, move around gently and you should be able to find most if not all of the cranial nerves. Your Scorecard. The numbers 20 , 21 and 22 denote the corpus callosum , the massive fibre bundle that connects upper two halves of the brain in both sheep and humans. Exercise 2. Show More.

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Dorsal to the massa intermedia is the fornix Align your knife or razor by placing it in the longitudinal fissure between the two hemispheres. These nerves can be very hard to find. We begin our study of the mid-sagittal cut with the massa intermedia 25 , the point at which the two halves of the thalamus join across the midline. Corpus Callosum Connects the left and right hemisphere and ensures hemispheres can communicate with one another. When you have completed the video of the sheep brain dissection, read the complete laboratory and answer the questions on the Review Sheet at the end of the laboratory. Good Luck. The Worlds Ten Easiest Questions. Please print out these slides ahead of time and be prepared to take notes. Add to playlist. The full Brainstem, all or most of the Cranial Nerves, and Temporal lobe or Pyriform lobe should be clearly visible. For this final view, use the scalpel and cut your brain in half making a midsagittal slice. Use the figure below to identify the largest portion of the brain the Cerebrum the entire cortical region area and the Frontal motor strip; strategy, reasoning, long-term planning , Parietal somatosensory area , and Occipital vision lobes respectively.