Anatomy - Head & Neck Flashcards
What are the contents of foramen OVALE?
- Otic ganglion
- V3 (mandibular nerve)
- Accessory meningeal artery
- Lesser petrosal Nerve
- Emissary veins
What are the contents of foramen spinosum?
- Middle meningeal artery
- Meningeal branch of the mandibular nerve
What is the content foramen rotundum?
Maxillary nerve (V2)
What are the contents of foramen Lacerum?
- ICA (passes along sup border but doesn’t transverse it)
- Vidian Nerve
- Artery of the pterygoid canal
The Vidian nerve is the nerve of the pterygoid canal, it is formed by the uion of the deep petrosal and superficial great petrosal nerve
What are the contents of the Optic Canal
- Optic nerve ( and 3 layers of dura)
- Ophthalmic artery
- Sympathetic nerves
Lazy French Tarts Sit Nakedly In Anticipation SI
Contents of the superior orbital fissure
- Lacrimal branch of V1
- Frontal branch of V1
- Trochlear CN IV
- Superior division of Occulomotor CNIII
- Nasociliary branch of V1
- Inferior division of Occulomotor CNIII
- Abducens CNVI
- Superior ophthalmic vein
- Inferior ophthalmic veins
Contents of carotid canal
SIDE
- Sympathetic plexus around arteries
- ICA
- Deep petrosal nerve
- Emissary veins
Contents of the jugular foramen
Ant: inferior petrosal sinus
Mid: CN IX, CN X, CN XI
Pos: sigmoid sinus (becoming IJV) and meningeal branches from the occipital and ascending pharyngeal arteries
Contents of the stylomastoid foramen
- Stylomastoid artery
- Facial nerve
Contents of foramen Magnum
Vessels -*vertebral arteries, anterior spinal artery & posterior spinal artery
Nerves - spinal root of XI, lower end of medulla
Tissues - tentorial membranes, apical ligament of dens
Which foramens in the Sphenoid bone
- Optic canal
- Superior Orbital Fissure
- Foramen rotundum
- Foramen Ovale
- Foramen Spinosum
- Foramen Lacerum
Which foramens in the temporal bone
- Carotid canal
- Jugular Foramen
- Stylomastoid foramen
Which foramen in the occipital bone?
Foramen magnum
What are the cavernous sinuses?
Paired sinuses in the body of the sphenoid bone, from the superior orbital fissure to the pterous temporal bone
OTOM CAT
Contents of the cavernous sinus?
Lateral wall components (top - bottom):
- Occulomotor CNIV
- Trochlear CNIII
- Ophthalmic CNV1
- Maxillary CNV2
Contents of sinus (medial - lateral):
- ICA (& sympathetic plexus)
- Abducens CNVI
Relations of the cavernous sinus
medial and lateral
Medial:
- pituitary fossa
- Sphenoid sinus
Lateral:
- Temporal lobe
Blood supply of the cavernous sinus
Ophthalmic vein
superficial cortical veins
Basilar plexus of veins pos
What does the cavernous sinus drain into
Internal jugular vein - via the superior and inferior petrosal sinuses
Features of cavernous sinus syndrome?
- Ophthalmoplegia (unilateral)
- Proptosis
- Pain
- CNV1 lesion
- Horners syndrome
Sternocleidomastoid Muscle
Name the origin, insertion, innervation and action
Origin:
- sternal head from manubrium
- clavicular head from lat 1/3 clavicle
Insertion:
- mastoid process of temporal bone
- sup nuchal line of occipital bone
Innervation:
- Accessory nerve CNXI (motor)
- Ant rami ansa cervicalis C2-3 (sensory)
Actions:
- Both: extension of head at atlanto-occipital joint, flexion of cervical vertebra and accessory muscle of inspiration
- Unilateral: lateral flexion of neck
