Nervous System Flashcards
What are your unpaired cranial bones?
Frontal
Occipital
Sphenoid
Ethmoid
What are your unpaired facial bones?
Vomer
Mandible
[Junctions of the skull]
Frontal + temporal + parietal + greater wing of sphenoid
Pterion
[Junctions of the skull]
parietomastoid + occipitomastoid + lamboid
Asterion
[Junctions of the skull]
coronal + saggital suture
Bregma
[Junctions of the skull]
labdoid + saggital suture
Lambda
The anterior fontanelle is the future site of
Bregma
close by 18 months
The posterior fontanelle is the future site of
lamda
close during the first few months after birth
Hematoma in the temple is most likely due to a tear of
MMA
can cause epidural hematoma
The middle meningeal artery is a branch of the
maxillary of external carotid artery
[Where is the fracture]
blood or CSF to escape from the ear, hearing loss and facial nerve damage
Fracture of the petrous portion of the temporal bone
[Where is the fracture]
anosmia, periorbital bruising/raccoon eye and CSF leakage from the nose/rhinorrhea
Anterior cranial fossa
What are the contents of the petrous portion of the temporal bone
- Vestibulocochlear organ
- ICA
- Petrosal sinus
- Branch of CN VII, VIII, IX, X, XII
- petrosal and sigmoid sinus
What houses the anterior cranial fossa?
- Cribiform plate of the ethmoid
2. CN 1
What are the layers of the scalp?
Skin Connective Aponeurosis Loose connective tissue Pericranium/Periosteum
What are the three primary bran vesicles?
- Prosencephalon/Fore brain
- Midbrain/Mesencephalon
- Hindbrain/Rhombencephalon
Remember, P comes first with R, F comes first with H.
What are your secondary brain vesicles?
Remember, TD MsMtMe
- Telencephalon
- Diencephalon
- Mesencephalon
- Metencephalon
- Myelencephapon
What are your adult brain structures?
Remember:
- Cerebrum
- Diencephalon
- Midbrain
- SC
What are the components of your cerebral hemisphere?
- Cortex
- White matter
- Basal nuclei
What are the components of your diencephalon?
- Thalamus
- Hypothalamus
- Epithalamus
- Retina
What are the adult structures of your Metencephalon?
- Pons
2. Cerebellum
What are your neural crest derivative?
- Pigment cells of retina
- Cells of the adrenal medulla
- Meninges
- Neurolemnal sheath of peripheral nerve
- Sensory ganglia of cranial and spinal nerves
Absence of neural crest cell migration in Hirschsprung disease is due to ___
RET mutation
What are the three protective membranes of the brain and spinal cord?
- Dura Mater
- Arachnoid mater
- Pia mater
What is the inner surface of skull bones?
Endosteal layer
What separates the endosteal layer and meningeal layer?
Venous sinus
What are the septa that divide the cranial cavity into freely communicating spaces?
- Falx cerebri - sickle shaped
- Tentorium cerebelli - crescent shaped
- Falk cerebelli - small, sickle shaped
- Diaphragma sella - circular
The dura mater receives its sensory nerve supply from the
- C1 to C3
2. Trigeminal nerve
Referred headache and face is related to what nerve supplying the dura above the tentorium
Trigeminal nerve
Headache referred to the back of the head
Cervical nerves
___ lines the pia mater and dura mater
arachnoid mater
what is the potential space between arachnoid mater and dura mater?
Subdural space
Remember:
What is the potential space between the pia mater and he arachnoid mater?
Subarachnoid space
Remember: Ara is on top of Pia
What covers the gyri of the brain?
pia mater
composed of mesothelial cells
Wha is the functional classification of the cerebrum?
Brodmann classification
BA 44, 45
Broca = frontal = motor
Bro youre 44, were 22
BA 22
Wernicke = temporal = sensory
Bro your 44, were 22
[Brodmann classification]
pre-central gyrus
Primary Motor area = BA 4
[Brodmann classification]
somatosensory area
Post central gyrus
BA 312
[Brodmann classification]
primary visual area
BA 17
[Brodmann classification]
priamry auditory area
BA 41, 42
[Wernicke/Broca]
cannot comprehend
can speak nonsensical senstences
Wernicke = word salad
[Wernicke/Broca]
can comprehend
difficulty putting words together
Broca = broken speech
[Stroke presentation]
LE > UE weakness
contralateral paralysis
contralateral sensory loss
Anterior cerebral
[Stroke presentation]
UE > LE weakness
Contralateral paralysis of face, UE
Contralateral sensory loss of face and UE
MCA
[Stroke presentation]
contralateral hemianopia, with macular sparing
Posterior CA
[UMNL vs UMNL]
spastic paralysis, increased muscle tone, hyperreflexia, positive babinski, positive clonus, no atrophy
UMNL
[Thalamic nuclei]
Emotions
Anterior/Dorsomedial
[Thalamic nuclei]
sensory
VPL/VPM
[Thalamic nuclei]
motor
Ventral anterior
Ventral lateral
[Thalamic nuclei]
Vision
Lateral geniculate Body
[Thalamic nuclei]
hearing
Medial Geniculate Body
___ syndrome
pure hemilateral sensory loss without lesion, hemilateral pain
Dejerine-Roussy Syndrome
cross below the the thalamus
[Cerebellum]
Coordination of limb movements while being executed, regulate muscle tone
Anterior lobe = Paleocerebellum or Spinocerebellum
[Cerebellum]
coordinate voluntary movements
Posterior lobe = neocerebellum of cerebrocerebellum
[Cerebellum]
coordinate paraaxial muscle associated with equilibrium
Floculonodular lobe = Archicerebellum = vestibulocerebellum
[Cerebellum: syndrome]
Ataxia, dysmetria, dysdiadochokinesa
All voluntary = posterior
[Cerebellum: syndrome]
marked gait instability, loss of coordination in the LE
gait = anterior lobe syndrome
[Cerebellum: syndrome]
truncal ataxia
flocculonodular lobe syndrome
Draw your CSF flow
Remember:
Lat, 3, 4, sah
moon, sylvia, luschka magendie, villi
What is the volume of your CSF?
130mL
What are the layers traversed by the needle during lumbar puncture?
- Skin
- Superficial fascia
- Supraspinous ligament
- Interspinous
- Ligamentum flavin
- Epidural space
- Dura Mater
- Arachnoid
- Subarachnoid
SSS ILEDAS
What are the components of your basal ganglia?
- Caudate nucleus
2. Lentiform nuclei (Globus pallidus, putamen)
What are the roles of you basal ganglia
- Initiate voluntary movements
2. control of postural adjustments associated with voluntary movements
Dyskinesa refers to
Involuntary movements
What disease is associated with degeneration of your substantia nigra?
parkinsons disease
___ involuntary, irregular, jerking movement affecting the limb and axial muscle groups
Chorea
due to degeneration of striatal neurons
___ large flailing movements if one extremity or the arm and the leg on one side
hemiballismus
the degeneration of striatal neurons result in
chorea
damage to the contralateral subthalamic nucleus results to ___
hemiballismus
usually, PCA stroke
Clasp-knife spasticity is associated with what lesion?
UMN
Lead-pipe rigidity is associated with what lesion
basal ganglia lesions
NO PARALYSIS HERE!
Cranial nerves that has mixed sensory and motor function
CN 9, 10, 7, 5
Remember, Oh | Some Oh | Say Oh | Money To | Maters Touch | But And | My Feel a | Brother Virgin | Says Girls | Big Vagina | Brains A | Matter H | More
What are the nerves in your midbrain
CN III
CN IV
Mid 34
What are the nerves in your pons
CN V
CN VI
CN VII
CN VIII
Pons 5-8
What are the nerves in your medulla
CN IX
CN X
CN XI
CN XII
Medulla 9-12
Which cranial nerves have a parasympathetic component?
CN 9
CN 10
CN 7
CN 3
What exits the optic canal?
CN 2
Ophthalmic artery
What exits the SOF
- CN 3, 4, 6 V1
- Ophthalmic vein
- Lacrimal, Frontal, Nasociliary nerve
What exits the Foramen Rotundum
V2
What exits the foramen ovale
V3
What exits the Jugular foramen?
- CN 9, 10, 11
2. Sigmoid sinus to IJV
What exits the hypoglossal canal
- CN XII
What exits the Internal Acoustic Meatus?
- CN 7, 8
What exits the foramen magnum
- CN 12 roots
- Medulla and meninges
- Vertebral arteries
What are the foramens located in the middle cranial fossa
- Optic Cana
- Superior orbital fissure
- Foramen rotondum
- Foramen ovale
What exits the posterior cranial fossa?
- Jugular foramen
- Hypoglossal canal
- Internal acoustic meatus
- Foramen magnum
[Bone of skull]
Cribiform plate
Ethmoid
[Bone of skull]
optic canal
lesser wing of sphenoid
[Bone of skull]
superior orbital fissure
between lesser and greater wing of sphenoid
[Bone of skull]
foramen rotundum
greater wing of sphenoid
[Bone of skull]
foramen ovale
greater wing of sphenoid
[Bone of skull]
foramen spinosum
greater wing of sphenoid
what are the contents of your foramen spinosus
- Middle meningeal artery and vein
2. Meningeal branch of mandibular nerve
[Bone of skull]
Internal acoustic meatus
Petrous part of temproal bone
[Bone of skull]
jugular foramen
between petrous part of temporal and occipital
[Bone of skull]
hypoglossal canal
occipital
[Bone of skull]
foramen magnum
occupital
[Clinical correlates: cranial nerve affected]
Diplopia, eye down and out, ptosis, dilated and fixed pupil
CN 3
[Clinical correlates: cranial nerve affected]
diplopia, extorsion of the eye, downward gaze
CN 4
SO4 pulls the eye upward inward
[Clinical correlates: cranial nerve affected]
diplopia, medial deviation
abductor paralysis
CN 6
LR6 abducts the eye
[Clinical correlates: cranial nerve affected]
Facial paralysis loss of corneal/blink reflex hyperacusis dry mouth loss of lacrimation loss of taste (anterior 2/3)
CN 7: Bells palsy
[Clinical correlates: cranial nerve affected]
facial hemianesthesia, paralysis of muscle of mastication
ipsilateral jaw deviation, loss of general sensation (anterior 2/3)
CN V
[Clinical correlates: cranial nerve affected, be specific]
- paralysis of lower face
- forehead not wrinkled
- eyebrows not raised
- flat nasolabial fold
- eye does not close
CN 7, peripheral
[Clinical correlates: cranial nerve affected, be specific]
- paralysis of lower face
- forehead wrinkled
- eyebrows raised
- eyes closes but with weakness
CN 7, central
the facial nerve synapses at which part of thebrain?
pons
[Clinical correlates: cranial nerve affected, be specific]
Dysphonia, dysphagia, loss of gag, deviation of uvula
CN 9: Glossopharyngeal
arnolds nerve refers to the
auricular branch of vagus nerve
[Clinical correlates: cranial nerve affected]
weakness in turning head toward opposite side and shrugging shoulder
CN 11
[Clinical correlates: cranial nerve affected]
tongue hemiparalysis, deviation towards the weak side
CN 12
What are the branches of the arch of the aorta
- Brachiocephalic trunk
- Left common carotid
- Left subclavian
What are the branches of your external carotid artery?
- Superior thyroid
- Ascending pharyngea
- Linguial
- Facial
- Occipital
- Posterior auricular
- Superficial temporal
- Maxillary
SAL FOPS Max
What are the terminal branches of your internal carotid artery?
- Anterior cerebral artery
2. Middle meningeal artery
What divides the subclavian artery in to 3 parts?
Scalaneus anterior muscle
What are the branches of the first part of the subclavian artery?
- Vertebral
- Thyrocervical
- Internal thoracic
What are the branches of the second part of your subclavian artery?
- costocervical trunk
What is the relationship of the scalaneus anterior and subclavian artery?
The subclavian artery is posterior to the scalaneus anterior muscle
The left subclavian artery originates from the?
arch of the aorta
The right subclavian artery originates from the?
right brachiocephalic artery
[Part of the circle of willis]
Internal carotid
- Ophthalmic
- Posterior comminicating
- Anterior cerebral
- Middle cerebral
[Part of the circle of willis]
vertebral
- PICA
- Ant/Post spinal meningeal
- Medullary
[Part of the circle of willis]
basilar
- Post cerebral
- Superior cerebellar
- Pontine
- Labyrinthine
- AICA
Most commonly involved artery in rupture berry aneurysm
ACom