Lecture 8 (scalp And Cranial Cavity) Flashcards
What are the layers of the scalp
- Skin
2.dense connective tissue - Epicranial Aponeurosis
- Loose connective tissue
- Pericranium
In which scalp layer would an injury required suture?
Epicranial Aponeurosis
What is the role of the emissary veins
Connects the extracranium vessels to inercranium dura venous sinus and vines
How does infection spread to inter-cranium structure
Via emissary veins
Why would an infection that develop in the space between the pericranium and aponeurosis spread to the eyelid or root of nose?
Frontal belly of occipitofrontalis
Which nerves provide sensory innervation to scalp
Trigeminal nerve + cervical plexus
What are the two means of cervical drainage in the scalp?
Occipital and mastoid nodes that drains into Deep Cervical Nodes
Pre-auricular and parotid nodes
What are the three cranial fossa
Anterior, Middle and posterior cranial fossa
What are the bones found in the anterior cranial fossa?
Frontal, ethmoid and sphenoid bone
Which bones found in the middle cranial fossa and which lope its occupied by?
Sphenoid and temporal
Occupied by temporal lobe
What is posterior cranial fossa occupied by and what bones can be found in it?
Occupied by brainstem and cerebellum
Bones are sphenoid, occipital & temporal
What are buttresses
Thicker area of bones that transmit force to weaker areas
What are cranial meninges?
Membranous layers that help in protection of the brain
What are the two layers of dura mater?
Periosteal Layer
• Attached to bone
Meningeal Layer
• In contact with arachnoid
mater
What role does the dura mater folds play?
Limit the movement of the brain within the cavity
