Es344: The Ventricular System, Diencephalon, And Midsagittal Structures (Unit 3)

Front 1

The Ventricular System Part 1

Back 1

1) Lateral Ventricle
2) Anterior Horn of Lateral Ventricle
3) Body of Lateral Ventricle
4) Posterior Horn of Lateral Ventricle
5) Inferior Horn of Lateral Ventricle
6) Atrium / Trigone
7) Interventricular Foramen of Monro
8) Third Ventricle
9) Massa Intermedia
10) Hypothalamic Sulcus

Front 2

The Ventricular System Part 2

Back 2

11) Cerebral Aqueduct
12) Fourth Ventricle
13) Foramen of Luschka
14) Central Canal

Front 3

Flow of CSF

Back 3

1. Lateral ventricle
2. The intereventricular foramen of Monro
3. The third ventricle
4. The cerebral aqueduct
5. The fourth ventricle
6. SUBARACHNOID SPACE (via Foramen Magendie and two FORAMEN OF LUSHCKA)

Front 4

Choroid Plexus

Back 4

» Extension of pia mater containing capillaries.

Produces - Cerebrospinal fluid *CSF) and is present and produced in all the ventricles of the brain.

Front 5

Diencephalon

Back 5

» "Between brain," lies between the cerebral hemispheres and the midbrain.

Front 6

Diencephalon:

Composed of...

Back 6

1) Thalamus
2) Pulvinar
3) Lateral Geniculate Nucleus & Lateral Geniculate Body
4) Medial Geniculate Nucleus & Medial Geniculate Body
5) Hypothalamus
6) Pineal Gland/Body

Front 7

Diencephalon:

Thalamus

Back 7

» Both thalami are usually connected to each other by gray matter (cell bodies) called interthalamic adhesion.

Function - Relays and integrates sensory and motor information.
» Relay station for sensory pathways on their way to the cerebral cortex, except olfaction.

Front 8

Diencephalon:

Thalamus; Nuclei of the Thalamus

Back 8

» The nuclei of the Thalamus are either sensory, motor, limbic, or multimodal in function.

1) Pulvinar

2) Lateral Geniculate Nucleus & Geniculate Body

3) Medial Geniculate Nucleus & Body

Front 9

Thalamus; Nuclei of the Thalamus

Pulvinar

Back 9

» Multimodal nucleus of the thalamus.

» Connections with the parietal lobe association areas.

Front 10

Thalamus; Nuclei of the Thalamus

Lateral Geniculate Nucleus

Back 10

» Visual system.

» Sensory nucleus of the thalamus.

Located - Dorsally

Front 11

Thalamus; Nuclei of the Thalamus

Medial Geniculate Nucleus

Back 11

» Auditory

» Sensory nucleus of the thalamus.

Located - Dorsally

Front 12

Diencephalon:

Hypothalamus

Back 12

» Major director of the endocrine and autonomic nervous systems, therefore controls much visceral function.

» E.g. Eating, autonomic function, body temperature, water balance, anterior pituitary function, circadian rhythm, and expression of emotions.

Front 13

Diencephalon:

Pineal Gland/Body

Back 13

» Secretes melatonin.

Front 14

STRUCTURES SEEN ON A MIDSAGITTAL SECTION

Part 1

Back 14

1) Third Ventricle
2) Fourth Ventricle
3) Cerebral Aqueduct
4) Intreventricular Foramen of Monro
5) Anterior Commissure
6) Corpus Callosum (ROSTRUM, GENU, BODY, SPLENIUM)
7) Posterior Commissure
8) Septum Pellucidum

Front 15

STRUCTURES SEEN ON A MIDSAGITTAL SECTION

Part 2

Back 15

9) Massa Intermedia
10) Hypothalamic Sulcus
11) Fornix
12) Fornix Column
13) Fornix Body
14) Mamillary Body
15) Optic Nerve / CN II
16) Optic Chiasm