HMI204 - Image Test Revision

CT + MRI Orientation

• Axial

• Sagittal

• Coronal

Locate: Sulci, Grey Matter + White Matter

What is this?

Basal Nuclei

What Meningeal Layers are visible?

• Dura Matter

• Subarachnoid Space = Dark Space

What is the arrow pointing to? + Attachment Points

• Falx Cerebri

• Anteriorly: Crista Galli on Ethmoid Bone

• Posteriorly: Occipital Protuberance

What is the arrow pointing to?

• Superior Sagittal Sinus

What is this?

• Tentorium Cerebelli

What is the mouse Pointing to? + What does it create?

• Anterior Horn of Lat. Ventricle

• Houses Choroid Plexus → Creates CSF

• IF: Caudate nucleus swells → Impacts Lat. Ventricle → Huntingtons Disease

What is in between Lat. Ventricles?

• Septum Pellucidum

What is this? + Function

• Interventricular Foramen

• Communicates CSF from Lat Ventricles → 3rd Ventricle

What is highlighted?

• 3rd Ventricle 

• CSF then goes to Cerebral Aqueduct

What is Top + Bottom Circle + Arrow?

• Top: 3rd Ventricle

• Bottom: 4th Ventricle

• Arrow: Cerebral Aqueduct

What Fissure is this?

Left Lateral Fissure

What Fissure is this?

Interhemishperic Fissure

Where is Central Sulcus? + Lobes + Gyrus

• Below T sign

What Sulcus is the circle + What Lobe is the arrow

• Circle: Lateral Sulcus

• Arrow: Temporal Lobe

What fossa?

• Posterior Cranial Fossa

• THAT IS CEREBELLUM not Occipital Lobe

What Part of Brain Stem?

• Pons

• Look for Basilar Groove

What Part of Brain stem?

• Mid-brain

• Look for Cerebral Aqueduct

What Part of Brainstem?

• Medulla Oblungata

• Stops at Foramen Magnum

What type of Matter is Corpus Callosum?

• White matter

Function of Corpus Callosum?

• To communicate with Cerebral Hemispheres

What Portion of the Corpus Callosum is this?

• Genu

Is this normal/abnormal?

• Normal: the Choroid Plexus can Naturally Calcify

What vessel would be here?

ACA

What vessel is found Next to Lateral Fissure?

MCA

What vessel is found next to Inter-hemispheric Fissure?

• ACA

What vessel is impacted if Falx Cerebri is impacted?

ACA

Difference between MRI T1 & T2 Images?

• T1: Fat is Bright

• T2: Fluid is Bright

What happens if this space is fractured?

• All CN that move eye is impacted

• Trigeminal, Trochlea, Abducent

What is this? + Pathway to it

• Hippocampus

• Mammilary Body → Fornix → Hippocampus

Name these Cisterns

What is this?

Lateral Sulcus

What nerve travels here? 

• Trigeminal Nerve (at level of Pons)

What nerve travels here?

• CN 3 (3 and 4 are at level of midbrain)

What is the orientation + what are these vessels?

Label these 3 vessels (inferior to superior)

• Vertebral

• Basilar

• PCA

Orientation?

What vessels are Lateral and Medial

Lateral: Internal Carotid

Medial: Vertebral

What veins are these

What vein is highlighted?

Internal jugular vein

Which Lobe is Taste processed?

Frontal Lobe - Gustatory Cortex

Which Lobe is Sound processed?

Temporal Lobe - Auditory Cortex

Which Lobe is Taste processed?

Occipital Lobe - Visual Cortex