Sheep Brain Dissection
By: Ryan Begun and Nick Palladino and
Mr. Davis
The Dura Mater
• The dura mater is a
thick durable
membrane covering
the brain and closest
to the skull.
• Surrounds and
supports the large
venous channels
carrying blood from
the brain toward the
heart.
Pia Mater
• Thin white coating
on the brain
surface
• Contains blood
vessels that supply
blood to the brain.
The Cerebrum
• The largest part of the
human brain.
• Associated with higher
brain functions such as
thought and action.
• Cerebrum is divided into
five lobes.
• Frontal, Parietal,
Occipital, Temporal, and
insula.
The Cerebellum
• Also known as the
“little brain”
• Associated with
regulation and
coordination of
movement, posture,
and balance.
Involuntary Control
The Brain Stem
• Responsible for vital
life functions such as
breathing, heartbeat
and blood pressure.
• The brain stem is
made of the midbrain,
pons, and medulla
oblongata.
Medulla Oblongata
• Controls autonomic
functions, such as
heart rate,
respiratory rate,
coughing, vomiting
etc.
• Relays nerve
signals between
the brain and
spinal cord
The pons
• Involved in the
motor control and
sensory analysis.
Midbrain
• Relay station for
auditory and visual
information
• Eye movement
Frontal Lobe
• Involved in our
motor functions.
• Problem solving
• Memory
• Language
• Judgment
• Impulse control
• Houses our
personality
Temporal Lobe
• Associated with
perception and
recognition of the
auditory stimuli,
memory, and
speech.
Occipital Lobe
• Associated with
visual processing
• Helps interprets
what the eyes see
Parietal Lobe
• Associated with
movement
• Orientation
• Recognition
• Perception of the
stimuli to the body
• Sense of Touch
• Primary
Somatosensory
Cortex
Gyri and Sulci
• Gyri is the bumps,
elevated ridges in
the cerebral cortex
as shown by the
circles.
• Sulci: the
indentations,
shallow grooves,
as shown by the
solid lines
Gyrus
Sulcus
Pre central gyrus
• Located in front of
the central sulcus.
First Gyrus in the
frontal lobe.
• Voluntary
movement of
skeletal muscles
Post central gyrus
• In parietal lobe first
gyrus behind the
central sulcus.
• Receives sensory
feed back from all
over the body;
including
• From joints
• And tendons
• Internal Organs
Central Sulcus
• Groove, separates
frontal and parietal
lobes.
Longitudinal Cerebral Fissure
• Separates the two
sides of the cerebrum
Diencephalon
• Thalamus
• Hypothalamus
Thalamus
• Processes and relays
movement and
sensory information
Hypothalamus
• Controlling hunger
and thirst
• Emotions
• Body Temperature
regulation
• Circadian rhythms
• Other Homeostatic
Controls. Read in
your book about this
little but important
part of the brain.
Corpus Callosum
• Communication
between the left and
right hemispheres
• Forms roof of lateral
and third ventricles
• Myelinated White
Matter
White Matter
• Area where
messages pass
through
• Develops throughout
life.
• Myelinated
Grey Matter
•
•
•
•
•
•
•
Muscle Control
Sensory Perception
Seeing
Hearing
Memory
Speech
Emotions
• UNMYELINATED