191

Front 1

ACCESSORY MENINGEAL ARTERY

Back 1

2. Accessory meningeal artery: arises from the maxillary artery and en-
ters the skull through foramen ovale; supplies the trigeminal ganglion
and adjacent dura mater

Front 2

ANTERIOR MENINGEAL ARTERIES

Back 2

3. Anterior meningeal arteries: arise from the ophthalmic artery and pass
posteriorly through the superior orbital fissure to supply the dura mater
and bone ofthe middle cranial fossa

Front 3

POSTERIOR MENINGEAL ARTERIES

Back 3

4. Posterior meningeal arteries: arise from the occipital artery and enter
the skull through the jugular foramen to supply the dura mater and bone
ofthe posterior cranial fossa

Front 4

MENINGEAL VEINS

Back 4

5. Meningeal veins: accompany the meningeal arteries and drain into dural
venous sinuses

Front 5

SENSORY INN. OF CRANIAL DURA MATER

Back 5

E. Nerves: sensory innervation ofthe cranial dura mater is provided prima-
rily by meningeal branches ofthe ophthalmic, maxillary, and mandibular
divisions ofthe trigeminal nerve

Front 6

DURAL VENOUS SINUSES

WHAT ARE THEY?

Back 6

II. Dural Venous Sinuses

A. Venous channels within the cranial dura mater; they receive cerebral and
meningeal veins and drain into the internal jugular and emissary veins

Front 7

SUPERIOR SAGITTAL SINUS

-how does it course?
-receives?
-"confluence of sinuses"
-name all related cavities (3)

-laterally exhibits?

Back 7

B. Superior sagittal sinus
1. Courses posteriorly within the attached superior margin ofthe falx
cerebri; receives many cerebral veins and drains into the confluence of
the sinuses, the site of junction ofthe superior sagittal, straight, and
occipital sinuses, anterior to the internal occipital protuberance

2. Laterally, it exhibits several diverticula called lateral lacunae

Front 8

HEAD TRAUMA

VS.

SUPERIOR SAGITTAL SINUSG
-what type of hematoma?

Back 8

3. Clinical note; in head trauma, the brain may move abruptly, tearing
cerebral veins at the site of their entry into the superior sagittal sinus;
blood from torn cerebral veins may accumulate between the cranial dura
mater and arachnoid, forming a subdural hematoma, which converts the
potential subdural space into a real subdural space

Front 9

INFERIOR SAGITTAL SINUS

Back 9

C. Inferior sagittal sinus: courses posteriorly within the inferior free margin
of the falx cerebri; joins the great cerebral vein at the anterior margin of
the tentorium cerebelli to form the straight sinus (the great cerebral vein
drains deep structures ofthe brain)

Front 10

STRAIGHT SINUS

Back 10

D. Straight sinus: courses posteriorly within the tentorium cerebelli along its
site of attachment to the falx cerebri; drains into the confluence ofthe sinuses