CHAPTER 4 -- Hindbrain, Midbrain, Forebrain

Metencephalon

pons + cerebellum

(T/F) You can see the cerebellum from the ventral view on both DOGS and HUMANS

TRUE

(T/F) You can see the cerebellum from the dorsal view on both DOGS and HUMANS

FALSE

Dogs yes

Humans: cerebellum can only be seen from ventral view

Roof of 4th ventricle

cerebellum

Floor of 4th ventricle

pons and medulla

Myelencephalon

medulla oblongata

Pons + Medulla is known as ____

Brain Stem

In HUMANS, the olive is called ___

inferior olivary nuclei

In DOGS, the olive is called___

olivary nuclei

In the ventral view of the brain stem, you can see ____

olive and pyramid

In the dorsal view of the brain stem, you can see____

cuneate tubercle, nucleus cuneate, nucleus gracilis, fasciculus cuneate, fasciculus gracilis, cerebellar peduncles

Cranial Nerve IX, X, XI, XII come out of ___

medulla

Cranial Nerve VI, VII, VII come out of ___

junction of medulla and pons

Cranial Nerve V comes out of ___

pons

(T/F) Humans have SMALL vermis and LARGE cerebellar hemispheres

TRUE

(T/F) Animals have SMALL vermis and LARGE cerebellar hemispheres

FALSE

Animals have LARGE vermis and SMALL cerebellar hemispheres

Function of Vermis

Balance

The function of the two cerebellar hemispheres surrounding vermis of cerebellum

fine motor movement

Midbrain is also called____

Mesencephalon

Dorsal part of Mesencephalon is_____

tectum

Ventral part of Mesencephalon is_____

tegmentum

The cerebral aqueduct is called ___ in animals

mesencephalic aqueduct

The dorsal tectum is made up of 4 parts collectively called ____

corporal quadrigemina

The superior colliculi is called ____ in animals

rostral colliculi

The inferior colliculi is called ___ in animals

caudal colliculi

The rostral (superior) and inferior (caudal) colliculi make up the _____

tectum of the midbrain

The interpeduncular space contains cranial nerve_____

Cranial Nerve III (oculomotor)

In Diencephalon, the thalamus is _____

Dorsal

In Diencephalon, the hypothalamus is _____

Ventral

Pineal gland produces_____

melatonin

Diencephalon divided into halves by the _____

3rd ventricle

Pituitary body hangs ventrally from the ___

hypothalamus

Left and right thalamus connected by ____

Mass intermedia (Human)
Interthalamic adhesion (animal)

(T/F) Optic chiasm is decussation of optic nerve II

TRUE

Foramina of Monro

connects lateral ventricles to third ventricle

Choroid plexus lines the ______, _______, ________, ventricles

Choroid plexus lines lateral, 3rd, 4th ventricles

Choroid plexus function

produces CSF

(T/F) Humans have cruciate sulcus

FALSE

Sheep brains have this sulcus

Fissure

deep groove

Sulcus

shallow groove

Name the fissure found ONLY in animal Brains:

Cruciate Sulcus

(T/F) insula can be found in humans and animals

FALSE

Insula in humans ONLY

Basal Ganglia is also called ____

corpus striatum

The 3 nuclei of basal ganglia are___

1. Caudate nucleus
2. Putamen
3. Globus Pallidus

Lentiform nucleus of basal ganglia is both____

putamen + globus pallidus

dorsal longitudinal fissure is found in _____

separate the brain into two hemispheres, left and right

FOUND IN ANIMALS

Corpus Callosum

Connects the left & right hemispheres.

Internal Capsule

important pathways, corticospinal tract