Rhoton's I Flashcards

Atlas

Axis

Uncinate process
The uncinate process of the cervical spine is a hook-shaped process found bilaterally on the superolateral margin of the cervical vertebral bodies of C3-C7.
The uncinate processes are more anteriorly positioned in the upper cervical spine and more posteriorly location in the lower cervical spine.


Odontoid process

Superior articular facet for joint with occipital condyle

Facet joint


Lamina

Lateral mass

Spinous process

Transverse foramen

V2

V3

Facet joint

Lamina

Odontoid process

Transverse process

Facet joint

Spinous process

Pedicle

Superior articular process

Lateral mass

Nerve roots

Facet joints

Arcuate eminence

Carotid groove of sphenoid bone

Meatal depression

Petrous temporal bone

Sigmoid sinus

Superior petrosal sinus

Tegmen

Torcula

Trigeminal prominence

Tuberculum sella
Relations of the sphenoid bone

Frontal and ethmoid anteriorly
Squamosal temporal bone laterally
Posteriorly the petrous temporal and occipital bone
What bones form the foramen lacerum?
Foramen lacerum formed by the junction of the petrous apex, sphenoid bone and occipital bone

What bounds the lateral edge of the carotid groove of the sphenoid bone?

The lingula


Middle clinoid process

Planum sphenoidale which forms the roof of the sphenoid sinus

Dorsum sella which forms the upper clivus

What structure runs here?

This is the petroclival fissure in which the inferior petrosal sinus runs

Intrajugular portion of the temporal bone

Anterior clinoid process

Anterior limbus of chiasmatic sulcus

Body of the sphenoid bone

Chiasmatic sulcus

Dorsum sella

Greater wing of sphenoid

Lesser wing of sphenoid

Posterior clinoid process

Sella turcica

Tuberculum sella

Vidian canal

Carotid canal

Infratemporal crest

Infratemporal fossa

Mastoid notch

Maxillary sinus

Occipital groove

Pterygoid process

Petroclival fissure

Foramen rotundum

Median pterygoid plate

Vidian canal

Carotid canal

Foramen ovale

Foramen spinosum
Etymology- sella turcica
Turkish saddle

Pterion

Sphenosquamosal suture

Temporal fossa

Zygoma

Zygomatic arch

Anterior clinoid process

Anterior ethmoid canal

Body of sphenoid

Ethmoidomaxillary suture

Frontal process of maxilla

Frontoethmoidal suture

Greater wing of sphenoid

Inferior orbital fissure

Infraorbital canal

Infraorbital foramen
Contents of the infraorbital canal
Infraorbital nerve (V2)
Infraorbital artery (Maxillary artery)

Contents of the anterior ethmoidal foramen
Anterior ethmoidal artery and vein
Anterior ethmoidal nerve, branch of nasociliary (V1)


Lacrimal bone

Lesser wing of sphenoid

Maxilla

Optic canal
Contents of optic canal
Opthalmic artery
Optic nerve
Contents of the inferior orbital fissure
Inferior Orbit Gets Infra-Orbital Nerves And VeinZ
IO: inferior ophthalmic vein (a tributary to both pterygoid venous plexus and cavernous sinus)
G: ganglionic branches from the pterygopalatine ganglion to maxillary division of the trigeminal nerve
ION: infra-orbital nerve (branch CN V2)
A: infra-orbital artery (branch maxillary artery)
V: infra-orbital vein (drains inferior orbit, communicates with the inferior ophthalmic vein, a tributary to pterygoid venous plexus)
Z: zygomatic nerve (branch CN V2)


Optic strut

Orbital plate of ethmoid bone

Orbital process of palatine bone

Posterior ethmoid foramen
Contents of the posterior ethmoid foramen
Posterior ethmoidal foramen opens at the back part of this margin under cover of the projecting lamina of the sphenoid, and transmits the posterior ethmoidal vessels and nerve.


Sphenoethmoidal suture

SOF
Contents of SOF
Long Fissures Seem To Store Only Nerves, Instead Of Arteries, Including Ophthalmic Veins (Superior to Inferior)
L: lacrimal nerve (branch of CN V1)
F: frontal nerve (branch of CN V1)
S: superior ophthalmic vein (a tributary to cavernous sinus)
T: trochlear nerve (CN IV)
SO: superior division of the oculomotor nerve (CN III)
N: nasociliary nerve (branch of CN V1)
IO: inferior division of the oculomotor nerve (CN III)
A: abducens nerve (CN VI)
IOV: inferior ophthalmic vein (tributary to both cavernous sinus and pterygoid venous plexus)


Hiatus of the endolymphatic sac

Hook of the sigmoid sinus

Inferior petrosal sinus (which runs in the petroclival fissure)

Jugular foramen
Contents of the jugular foramen
Pars nervosa:
Inferior petrosal sinus
IX + Jacobson’s (tympanic canaliculus)
Pars vasculosa:
IJV
X, XI
Nerve of Arnold (mastoid canaliculus)
Posterior meningeal artery


Porus of the IAM

Cochlear area of IAM

Facial canal

Inferior vestibular area

Singular foramen

Superior vestibular area

Transverse (falciform) crest

Vertical crest
Bill’s bar
Contents of singular foramen
The foramen singulare, also known as the singular foramen, is a small opening at the posteroinferior aspect of the fundus of the internal auditory canal (IAC)
It carries the singular or posterior ampullary nerve, a branch of the inferior vestibular nerve which carries afferent information from the posterior semicircular canal

Central sulcus

Frontal lobe

Inferior frontal gyrus

Middle frontal gyrus

Occipital lobe

Parietal lobe

Parieto-occipital sulcus

Pre-occipital notch

Supramarginal gyrus

Sylvian fissure

Temporal lobe

Central lobe

Central sulcus

Frontal lobe

Inferior frontal gyrus

Inferior frontal sulcus

Middle frontal gyrus

Middle temporal gyrus

Occipital lobe

Parietal lobe

Post central gyrus

Postcentral sulcus

Precentral gyrus

Precentral sulcus

Premotor cortex

Subcentral gyrus

Superior frontal gyrus

Supramarginal gyrus

Vein of Trolard

Ambient cistern

Anterior medial temporal lobe

Calcarine sulcus

Central lobe

Cingulate gyrus

Cingulate sulcus

Corpus callosum

Cuneus

Fusiform gyrus


Lingual gyrus

Marginal ramus of the cingulate sulcus

Middle media temporal lobe

Paracentral lobule

Paracentral sulcus

Parieto-occipital sulcus

Precuneus

Quadrigeminal cistern

Superior parietal lobule

Supplementary motor area

Uncus

Cerebellar tonsils

Cerebellar vermis

Cerebral aqueduct

Floor of the 4th ventricle

Inferior medullary velum

Superior lateral recess of the fourth

Tonsil of cerebellum

Uvula of vermis

Floculus

Superior cerebellar peduncle

Inferior medullary velum

Tela choroidea


Abducens

Auditory nerve

Cerebral peduncle

Choroid plexus

Facial nerve

Foramen of Luschka

Glossopharyngeal nerve

Rootlets of hypoglossal nerve

Lateral margin of the pons

Pontomedullary sulcus

Spinal portion of accessory

Trigeminal

Vagus

Flocculus

Auditory nerve

Cerebellopontine angle

Facial nerve

Foramen of Luschka

Glossopharyngeal nerve

Abducens nerve

AICA

Auditory nerve

Axilla of the trigeminal nerve

Oculomotor nerve

PICA

SCA

Ambient cistern

Bridging veins

Pineal gland

Posterior cerebral artery

Quadrigeminal cistern

Tentorium

Ambient cistern

Collicular plate

Internal cerebral veins

Pineal gland

Posterior cerebral artery

Splenium of the corpus callosum

Straight sinus

Trochlear nerve

Vein of Galen

Inferior colliculi

Pineal gland

Superior colliculus

Basal vein of Rosenthal


Inferior colliculus

Internal cerebral vein

Medial posterior choroidal artery
Branch of P2

Pineal gland

Superior colliculus

Tentorium

Velum interpositum


Cerebellar midbrain fissure

Anterior commissure

Body of fornix

Body of the lateral ventricle

Choroid plexus

Column of fornix

ISS

Internal cerebral vein

Lamina terminalis

Mamillary body

Optic chiasm

Pineal gland

Pituitary stalk

Precentral vein

Straight sinus

Vein of Galen

Velum interpositum

Area postrema

Facial colliculi

Hypoglossal trigone

Median sulcus

Vagal triangle

Lateral ventricles

Choroid plexus

Corpus callosum

Genu of internal capsule

Thalamostriate vein
Note choroid plexus is medial to thalamostriate

Thalamus

Fornix

Internal cerebral vein

Septal vein

Superior choroidal vein

Velum interpositum

Thalamostriate vein

Velum interpositum

Internal cerebral vein

Medial posterior choroidal artery

Tela choroidea

Velum interpositum

Ambient cistern

Anterior commissure

Choroidal fissure

Columns of fornix

Foramen of Monro

Infundibular recess of the third ventricle

Lamina terminalis

Lateral geniculate body

Massa intermedia

Oculomotor nerve

Posterior commissure

Quadrigeminal cistern

Velum interpositum

Atrium of the lateral ventricle

Calcar avis
The calcar avis, previously known as the hippocampus minor,[1] is an involution of the wall of the lateral ventricle’s posterior cornu produced by the calcarine fissure

Crural cistern

Ambient cistern

Fimbria of fornix

Lateral posterior choroidal artery
Branch of P2

Medial posterior choroidal artery

Optic radiations

P1

P2

PComm

Pulvinar

Ambient cistern

Body of fornix

Choroidal fissure

Crus of fornix

Fimbria of fornix

Medial posterior choroidal artery

Pineal gland

PCA

Stria medullaris thalami

Velum interpositum
superiorly: the columns of the fornices and hippocampal commissure (psalterium) reaching as far forward as the foramen of Monro
inferiorly: the internal cerebral veins and tela choroidea of the third ventricle
inferolaterally: the thalamus
posteriorly: the narrow base of the triangle abuts the splenium of the corpus callosum

Internal cerebral vein

Septal vein

Superior choroidal vein

Thalamostriate vein

Angular gyrus

Inferior longitudinal fasciculus

Middle longitudinal fasciculus

Superior longitudinal fasciculus II

Short association fibres

Arcuate fasciculus

Broca’s area

Extreme capsule

Inferior fronto-occipital fasciculus
Function IFOF
The inferior fronto-occipital fasciculus (IFOF) is a large white matter tract of the human cerebrum with functional connectivity associated with semantic language processing and goal-oriented behavior.
Function SLF II
SLF II is the major component of SLF and originates in the caudal-inferior parietal cortex and terminates in the dorsolateral prefrontal cortex (Brodmann 6, 8 and 46).
SLF II connects to the caudal inferior parietal cortex which controls spatial attention and visual and oculomotor functions. This suggests the SLF II provides the prefrontal cortex with parietal cortex information regarding perception of visual space. Since these bundles are bi-directional, working memory (Brodmann 46) in the prefrontal cortex may provide the parietal cortex with information to focus spatial attention and regulate selection and retrieval of spatial information.
Function MLF
The medial longitudinal fasciculus (MLF) is a myelinated composite fibre tract found in the brainstem. The MLF primarily serves to coordinate the conjugate movement of the eyes and associated head and neck movements.

ILF
Function ILF
The inferior longitudinal fasciculus carries visual information from occipital areas to the temporal lobe (Catani et al., 2003a) and it is likely to play an important role in visual object recognition, semantic processing and in linking object representations to their lexical labels


Uncinate fasciculus
Function uncinate fasciculus
Function. The function of the uncinate fasciculus is not known, though it is traditionally considered to be part of the limbic system.. It has been proposed that the uncinate fasciculus allows mnemonic representations stored in the temporal lobe to interact with and guide decision making in the frontal lobe


Wernicke’s area

Claustrum

IFOF

Putamen

Ventral external capsule

Atrium of the lateral ventricle

Lateral geniculate body

Meyer’s loop


Optic radiations

Tapetum of the corpus callosum

Temporal horn of the lateral ventricle

Lateral geniculate body

Meyer’s loop

Cingulum

Corpus callosum
Etymology- carotid
from the greek “karotis”
early 17th century: from French carotide or modern Latin carotides, from Greek karōtides, plural of karōtis ‘drowsiness’, from karoun ‘stupefy’ (because compression of these arteries was thought to cause stupor).
Etymology- sphenoid
mid 18th century: from modern Latin sphenoides, from Greek sphēnoeidēs, from sphēn ‘wedge’.
Contents of vidian canal
Nerve of pterygoid canal, (Vidian nerve),
the artery of the pterygoid canal (Vidian artery),
and the vein of the pterygoid canal (Vidian vein)
Nerve of pterygoid canal
Formed by the union of the greater petrosal nerve (CN VII PNS) and the deep petrosal nerve (SNS)
PNS fibres synapse in the pterygopalatine ganglion

Vidian artery
Branch of maxillary (ECA) and petrous part of ICA.
Can serve as an anastomosis between ICA and ECA


Amygdala

Anterior commissure

Cingulum

Corpus callosum

Fornix

Hippocampus

Internal capsule

Mamillary body

Mammillothalamic fasciculus

Nucleus accumbens

Velum interpositum

Caudate nucleus

Claustrum

Corona radiata

External capsule

Extreme capsule

Globus pallidus

Insula

Internal capsule

Frontoparietal operculum

Putamen

Substantia nigra

Subthalamic nucleus

Thalamus

ACA

Crista Galli

Olfactory bulb

Olfactory groove

Olfactory tract

Optic nerve

Orbital roof

Planum sphenoidale

Abducens

Anterior ethmoidal arteries

Anterior ethmoidal nerve

Anterior fossa

Cavernous sinus

Clinoidal segment of ICA

Ethmoid sinus

Facial nerve

Frontal nerve

Frontal sinus

Geniculate ganglion

Greater petrosal nerve

Infratemporal fossa

Infratrochlear nerve

Lacrimal gland

Lacrimal nerve

Lateral rectus

Lateral wall of orbit

Long ciliary nerves

Mandibular nerve

Maxillary nerve

Meatal segment of facial nerve

Middle fossa

Nasociliary nerve

Oculomotor nerve

Olfactory bulb

Ophthalmic artery

Ophthalmic nerve

Ophthalmic segment of ICA

Optic canal

Optic nerve

Optic nerve sheath

Orbit

Orbital apex

Petrosphenoidal ligament

Pituitary gland

Pituitary stalk

Posterior ethmoidal artery

Pterygopalatine fossa

Sphenoid sinus

Superior hypophyseal artery

Superior oblique muscle of orbit

SOF

Superior vestibular nerve

Supraorbital nerve

How does the supratrochlear nerve leave the orbit?
The supratrochlear nerve then exits the orbit between the pulley of the superior oblique and the supraorbital foramen, curves up on to the forehead close to the bone, and ascends beneath the corrugator supercilii and frontalis muscles.

Supratrochlear nerve

Temporal fossa

Trigeminal ganglion

Motor root of trigeminal nerve

Trochlear nerve

A1

ACA

ICA

Lamina terminalis

MCA

Cerebral aqueduct

Third ventricle

A1 segment of ACA

A2 segment of ACA

ACA

AComm

ICA

MCA

ACA

Anterior choroidal artery

Communicating segment of ICA (C7)

MCA

Oculomotor nerve

Ophthalmic segment of ICA

Optic nerve

Perforating branches of PComm

PComm

SCA

Supraclinoid ICA (C6)

Abducens

Anterior clinoid process

Greater petrosal nerve

ICA

Maxillary nerve

Meckel’s cave

Oculomotor nerve

Optic nerve

SOF

Superior petrosal sinus

Tentorial edge

Trochlear nerve

Trigeminal nerve

Abducens nerve

Anterolateral triangle

Anteromedial triangle

Cavernous sinus

Clinoidal segment of ICA

Foramen ovale

Foramen rotundum


Inferior division of oculomotor nerve

Mandibular branch of trigeminal

Maxillary nerve

Oculomotor nerve

Ophthalmic artery

Ophthalmic nerve

Optic nerve

Optic nerve sheath

Optic strut

Orbital apex

Sphenoid sinus

Superior division of oculomotor

SOF

Trochlear nerve

Vidian nerve

Anterolateral triangle

Anteromedial triangle

Arcuate eminence

Cavernous sinus

Clinoidal triangle

Cochlear

Foramen spinosum

Greater petrosal nerve

Inferior orbital fissure

Infratemporal fossa

Infratrochlear triangle (Parkinson’s)

IAC

Lateral wall of orbit

Lesser petrosal nerve


Mandibular nerve

Middle meningeal artery

Oculomotor triangle

Optic canal

Orbit