Lab 2 Structures

Question 1

falx cerebri

Answer 1

• dural reflection that provides support between right/left cerebral hemispheres
• runs along sup/post aspects of skull
• contains superior sagittal sinus, inferior sagittal sinus, straight sinus

Question 2

tentorium cerebelli

Answer 2

• dural reflection positioned like a roof over posterior fossa
• supports cerebral hemispheres from below (lies above cerebellum)
• posterior attachment → groove for transverse sinus
• tentorial notch

Question 3

tentorial notch

Answer 3

opening in tentorium cerebelli that allows for posterior fossa brainstem to freely pass through dural reflection into posterior cranial fossa

Question 4

falx cerebelli

Answer 4

dural reflection that lies between/supports smaller cerebellar hemispheres

Question 5

superior sagittal sinus → ?

Answer 5

superior sagittal sinus → right transverse sinus

Question 6

inferior sagittal sinus → ?

Answer 6

inferior sagittal sinus → straight sinus

Question 7

straight sinus → ?

Answer 7

straight sinus → left transverse sinus

Question 8

transverse sinuses → ?

Answer 8

path from either transverse sinus → sigmoid sinus

Question 9

sigmoid sinuses → ?

Answer 9

sigmoid sinus → jugular foramen (internal jugular vein)

Question 10

cavernous sinus → ?

Answer 10

cavernous sinus → jugular foramen

Question 11

where is the ventricular system located?

Answer 11

within cerebral hemispheres and brainstem

Question 12

what does the ventricular system do?

Answer 12

• floats/bathes brain
• provides nutrients to brain

Question 13

what flows through the ventricular system?

Answer 13

cerebrospinal fluid (CSF)

Question 14

what flows through the sinus system?

Answer 14

deoxygenated blood

Question 15

lateral ventricles associated brain region

Answer 15

cerebral hemispheres

Question 16

third ventricle associated brain region

Answer 16

• thalamus
• hypothalamus

Question 17

cerebral aqueduct associated brain region

Answer 17

midbrain

Question 18

fourth ventricle associated brain region

Answer 18

• pons
• cerebellum
• medulla

Question 19

subdural hematoma

Answer 19

• between dura mater and arachnoid mater (subdural space)
• most common hematoma because space has lots of structures that can sheer/leak blood

Question 20

epidural hematoma

Answer 20

• most often caused by middle meningeal artery lesion
• takes awhile for Sx to show since artery is small

Question 21

subarachnoid hematoma

Answer 21

“the worst head of my life”