Neuroscience Lab 1 Quiz

Cribiform Plate

Olfactory formina, CN1

Optic canal, CN2

Supraorbital fissure

CN3, CN4, CN6, CNV1 (opthalmic branch)

Which structure? Houses which nerve?

Foramen Rotundum - CNV2 (Maxillary branch)

Foramen Ovale - CNV3 (Mandibular branch)

Structure? Houses what?

Foramen Spinosum - middle meningeal artery

Structure? Houses what?

Foramen Lacerum - internal carotid artery

Internal auditory meatus - CN7 & CN8

Jugular Foramen

Jugular Foramen Houses…

CN9, CN10, CN11, Internal jugular vein

Hypoglossal canal - exit for CN12

Foramen magnum - vertebral artery, junction of brainstem + spinal cord

Falx cerebri - between cerebral hemispheres

Falx cerebelli - between cerebellar hemispheres

Tentorium cerebelli - tent over cerebellum

Venous sinus path for Superior sagittal sinus

Superior sagittal sinus —> R transverse sinus —> Sigmoid sinus —> internal jugular vein

Venous sinus path for Internal sagittal sinus

Interior sagittal sinus —> straight —> L transverse sinus —> L sigmoid sinus —> internal jugular vein

Cavernous sinus path

Cavernous sinus —> petrosal sinus —> sigmoid sinus —> internal jugular vein (jugular foramen)

Ventricular system connection

Lateral ventricles —> interventricular foramina —> 3rd ventricle —> cerebral aqueduct —-> 4th ventricle

3 exits from 4th ventricle

2 lateral aperture, 1 median —> CSF enters subarachnoid space, surrounding brain and spinal cord (lumbar cistern) —> arachnoid villi —> superior sagittal sinus —> blood.

enlarged subarachnoid space at the bottom of spinal cord

lumbar cistern

3 Meningeal layers

Dura mater - arachnoid - pia mater

2 layers of Dura matter

periosteal layer, meningeal layer

Spaces in meningeal layers

Epidural, subdural, subarachnoid space

Items in subdural space, items in subarachnoid space

Subdural: bridging arteries

Subarachnoid: Arachnoid trabeculae (web like connective tissue), cerebral spinal fluid CSF

What portion of the temporal bone is this? Green region

Squamous portion of temporal bone

What part of the temporal bone is this?

Petrous portion of temporal bone

Groove on the greater wing of the sphenoid bone

Groove for middle meningeal artery

Carotid sulcus, continuation of the carotid canal, houses internal carotid artery + cavernous sinus.

Anterior fossa borders & contents

Borders:

• Anterior border = frontal bone

• Posterior border = anterior portion of the sphenoid lesser wing

Contents:

• Frontal lobe

Middle Fossa borders and content

Borders:

• Anterior border: greater wing of sphenoid

• Posterior border: petrous portion (superior ridge) of temporal bone

Contents: parietal, temporal, occipital lobes

Posterior fossa borders & content

Anterior border: sella turcica posterior wall + petrous portion of temporal bone

Posterior border: back of occipital bone

Content: cerebellum