Sheep Brain Dissection
How many major regions are contained within the diencephalon?
3
How many regions make up the brain stem?
3
The meninges consist of ___ layers.
3
Identify the passageway found in the spinal cord that is continuous with the ventricles.
Central canal
Which passageway connects the third and fourth ventricles?
Cerebral aqueduct
________________ fluid is produced within the ventricles.
Cerebrospinal
What structure connects the right and left cerebral hemispheres?
Corpus callosum
Which region of the diencephalon contains the pineal body?
Epithalamus
_________________ consists of neuron cell bodies, unmyelinated axons, and neuroglial cells.
Gray matter
Which of the structure attaches the pituitary gland to the brain?
Infundibulum
Which of the following ventricles is found under the corpus callosum?
Lateral ventricles
Which area of the brain stem is in contact with the spinal cord?
Medulla oblongata
Identify cranial nerve I.
Olfactory nerve
Which of the following areas takes visual information from one side of the body and conveys it to the opposite side?
Optic chiasm
Which of the following glands can be observed on the ventral surface of the sheep brain?
Pituitary
What part of the corpora quadrigemina is clearly observed in a midsagittal section?
Superior colliculus
Which of the following landmarks separate the cerebrum from the cerebellum?
Transverse fissure
All of the ventricles are/aren't interconnected.
are
The diencephalon is found in between the ____________ and _____________.
brain stem; cerebrum.
The following structures are part of the ___________________ Mammillary body Optic chiasm Optic tract
central nervous system
Where is the arbor vitae located?
cerebellum
Which region of the brain contains gyri and sulci?
cerebrum
Which region of the brain is necessary for consciousness?
cerebrum
The ____________________ is composed of the 2 superior colliculi and the 2 inferior colliculi.
corpora quadrigemina
The _____________ forms the central core of the brain and cannot be seen from the surface of the brain.
diencephalon
The cerebellum is located on the _________ surface of the brain.
dorsal
Which of the following is the outer layer of the meninges?
dura mater
White matter has a _______ consistency.
fatty
The ___________________ marks the border between the medulla oblongata and spinal cord.
foramen magnum
Which ventricle is located within the brain stem?
fourth ventricle
What type of tissue makes up the cerebral cortex?
gray matter
Which part of the diencephalon is connected to the pituitary gland?
hypothalamus
Which ventricles are divided by the septum pellucidum?
lateral ventricles
Which of the following landmarks divides the cerebrum in half?
longitudinal fissure
The pineal body secretes the hormone ____________
melatonin
The membranous encasement surrounding the brain
meninges
Which region contains the corpora quadrigemina?
midbrain
The ____________ forms the central core of the brain.
thalamus
Which region acts as a relay center for sensory messages ascending to the cerebrum?
thalamus
All three regions of the brain stem can be observed on the ventral surface of the brain. What are they?
the midbrain, pons, and medulla oblongata
What is the function of white matter?
transmits messages
The brain is not completely solid; it contains cavities called ____________.
ventricles
