Scalp, Skull and Cranial Cavity (Lab) Flashcards
Which layer of the scalp contains the superficial veins that will bleed profusely when the scalp is cut? A. Aponeurotic layer B. Connective tissue layer or hypodermis C. Loose connective tissue layer D. Periosteum E. Skin
B. Connective tissue layer or hypodermis
The superficial veins of the scalp connect to the dural sinuses by means of the:
Emissary veins
The diploic veins are located:
E. between the two bony layers of the skull.
The superficial temporal artery is a terminal branch of the:
External carotid artery
The auriculotemporal nerve supplying the temporal region of the head is a sensory branch of the:
mandibular division (V3) of the trigeminal nerve
What skull bone, in addition to the zygomatic bone, forms the zygomatic arch?
Temporal bone
The middle meningeal artery is a branch of the:
Maxillary artery
Pathway of middle meningeal artery
Branch of Maxillary artery.
It enters the skull through the foramen spinosum and branches to supply the meninges and bone on the lateral side of the skull.
The middle meningeal artery enters the cranial cavity through the:
Foramen spinosum
The archnoid granulations that extend into the dural sinuses are formed by the:
arachnoid layer of meninges
Which layer of the dura is responsible for formation of the dural reflexions?
Meningeal layer
The dural sinuses are located:
in or between the meningeal and the periosteal layers of the dura.
Where are the cerebral veins located?
Pia membrane
What vessel is usually ruptured in a patient that has a subarachnoid hemorrhage?
Cerebral artery
What dural reflexion separates supratentorial structures from posterior fossa structures?
Tentorium cerebelli
Which of the following structures passes through the foramen spinosum?
A. Accessory nerve
B. Auriculotemporal nerve
C. Mandibular division of the trigeminal nerve
D. Middle meningeal artery
E. Superficial temporal artery
D. Middle meningeal artery
Layers of scalp
The scalp consists of five layers. Skin: consists of dermis and epidermis;
Connective tissue: vascular layer responsible for excessive bleeding with scalp wounds;
Aponeurotic layer: connects the frontalis and occipitalis muscles;
Loose connective tissue layer: allows scalp to move over the bones of the cranium
Pericranium (periosteum)
Temporal muscle innervation
V3 (mandibular nerve)
calvaria
skull cap
epidural hematoma where and involving what vessel
Epidural hemorrhages involve rupture of a meningeal artery with blood forming a hematoma between the dura and the bone of the skull.
subdural hematome where and involving what vessel
rupture of a cerebral vein, with blood accumulating in the subdural space, a potential space until tearing of a cerebral vein occurs. Note that the tearing occurs where the vein crosses the subarachnoid space and enters the dural sinus that is firmly attached to the skull.
subarachnoid hemorrhage where and involving what vessel
involves a rupture of a cerebral artery with blood accumulating in the subarachnoid space.
