Transcript Comparing The Sheep Brain to A Human Brain

Comparing the Sheep Brain to
the Human Brain – A Visual
Guide to Use During Sheep
Brain Dissection Laboratories
Margarita Bracamonte, Ph.D.
Northland Community & Technical College,
East Grand Forks, MN
Several Community and Technical
Colleges currently do not have a human
cadaver laboratory to teach human
anatomy and physiology labs.
To learn about the human brain anatomy,
sheep brains are usually dissected in
anatomy and physiology laboratories at
Community and Technical Colleges.
Therefore, the next slides can be
used during the sheep brain
dissection laboratory to visually
compare the sheep brain to human
brain structures with the goal to
learn the anatomy of the human
brain.
How much does the sheep brain
weight compared to the human brain?
Sheep Brain?
140 grams*
*1 pound = 453.6 grams
Human Brain?
3 - 4 pounds
Human Brain
Sheep Brain
Cerebellum
Spinal Cord
The human brain (and sheep brain) is
made up of four parts:
1. Cerebrum
Human Brain
2. Cerebellum
Sheep Brain
Continues…
Midsagittal
Section
3. Diencephalon
4. Brainstem
Human Brain
Sheep Brain
4. Brainstem
Ventral View
Human Brain
Sheep Brain
Spinal Cord
Spinal Cord
Brainstem
Structures found in the Cerebrum
Sheep Brain
Cerebrum
Superior View
Human Brain
Cerebrum – Superior View
Longitudinal Fissure
Sheep Brain
Human Brain
Cerebrum
Human Brain – Right Lateral View
Transverse Fissure
Sheep Brain – Superior View
Cerebrum
Gyri (Gyrus – Singular)
Sheep Brain – Superior View
Human Brain – Lateral View
Cerebrum
Sulci (Sulcus – Singular)
Sheep Brain - Superior
Human Brain – Left Lateral View
Cerebrum – Midsagittal View
Sulci - shallow groves between gyri
Human Brain
Sheep Brain (Right Lateral View): Cerebral Lobes
Parietal Lobe
Frontal Lobe
Temporal Lobe
Occipital Lobe
Human Brain (Right Lateral View)-Cerebral Lobes
Frontal Lobe
Parietal Lobe
Temporal Lobe
Occipital Lobe
Gray & White Matter of the Cerebrum
Sheep Brain
(Anterior)
Human Brain
Gray
Matter
White
Matter
(Posterior)
Gray Matter = Cerebral Cortex
Human
Brain
Cerebral
Cortex
What
parts of a
neuron
are found
at the
cerebral
cortex?
White Matter = Cerebral Medulla
Human
Brain
Cerebral
Medulla
What
parts of a
neuron
are found
at the
cerebral
medulla?
Structures found
at the Cerebrum
Corpus
Callosum
Human Brain
Sheep Brain
Midsagittal
Section
Structures found
at the Cerebrum
Fornix
Human Brain
Sheep Brain
Midsagittal
Section
Structures found
at the Cerebrum
Lateral
Ventricles
Human Brain
Sheep Brain
Midsagittal
Section
Structures found
at the Cerebrum
Third
Ventricle
Human Brain
Sheep Brain
Midsagittal
Section
Structures found
at the Cerebrum
Fourth
Ventricle
Human Brain
Sheep Brain
Midsagittal
Section
Structures found at the Cerebellum
Human Brain
Cerebellum
Sheep Brain
Midsagittal
Section
Human Brain
Human Brain
Cerebellar Cortex
(Gray matter)
Sheep Brain
What parts of a neuron
are found at the
cerebellar cortex?
Midsagittal
Section
Human Brain
Human Brain
Cerebellar Medulla
(White matter)
Sheep Brain
What parts of a neuron
are found at the
cerebellar medulla?
Structures found at the Brainstem
Sheep Brain
Human Brain
Spinal Cord
Spinal Cord
Brainstem
Ventral View
Structures found at the Brainstem
Pons
Spinal Cord
Spinal Cord
Sheep Brain
Human Brain
Structures found at the Brainstem
Medulla
Oblongata
Spinal Cord
Spinal Cord
Sheep Brain
Human Brain
Structures found
at the Brainstem
Midsagittal
Section
Human Brain
Midbrain
Sheep Brain
Structures found
at the Diencephalon
Diencephalon
Human Brain
Sheep Brain
Midsagittal
Section
Structures found
at the Diencephalon
Thalamus
Human Brain
Sheep Brain
Midsagittal
Section
Structures found
at the Diencephalon
Hypothalamus
Human Brain
Sheep Brain
Midsagittal
Section
Cranial Nerves – Olfactory Nerves
Spinal Cord
Spinal Cord
Sheep Brain – Ventral View
Human Brain – Ventral View
Cranial Nerves – Olfactory Nerves
Olfactory Bulbs
Spinal Cord
Spinal Cord
Sheep Brain – Ventral View
Human Brain – Ventral View
Cranial Nerves – Olfactory Nerves
Olfactory Tracts
Spinal Cord
Spinal Cord
Sheep Brain – Ventral View
Human Brain – Ventral View
Cranial Nerves – Optic Nerves
Spinal Cord
Spinal Cord
Sheep Brain
Human Brain
Optic Nerves Cross at Optic Chiasm
Optic Chiasm
Optic Chiasm
Spinal Cord
Spinal Cord
Sheep Brain
Human Brain
Cranial Nerves – Optic Nerves
Optic Tracts
Optic Tracts
Spinal Cord
Spinal Cord
Sheep Brain
Human Brain
Practice your Knowledge About the
Human Brain Anatomy….
Name the
cerebral lobe
Anterior
Posterior
Describe the
function of this
cerebral lobe
Practice your Knowledge About the
Human Brain Anatomy….
Name this part
of the human
brain.
Anterior
Anterior
Describe its
function…
Posterior
Posterior
Practice your Knowledge About the
Human Brain Anatomy….
Anterior
Name this part
of the human
cerebrum
Describe its
function…
Posterior
Practice your Knowledge About the
Human Brain Anatomy….
Inferior view of the human
brain.
Name this part
of the brainstem
Describe its
function…
Practice your Knowledge About the
Human Brain Anatomy….
Inferior view of the human
brain.
Describe the
function of these
nerves…
Name these nerves
Practice your Knowledge About the
Human Brain Anatomy….
Name this
fissure
Anterior
Anterior
Describe its
function…
Posterior
Posterior