41 - Neurosurgery Flashcards
Comes together to form basilar artery
Vertebral arteries
Vertebral arteries branches into 2 _
Posterior cerebral arteries
Connect middle cerebral arteries to posterior cerebral arteries
Posterior communicating arteries
Branches off middle cerebral arteries
Anterior cerebral arteries
Anterior cerebral arteries connected via
anterior communicating artery
No axonal injury (temporary loss of function)
Neuropraxia
Disruption of axon with preservation of axon sheath
Axonotmesis
Disruption of axon AND myelin sheath
Neurotmesis
bare sections of nerve, allows salutatory conduction
Nodes of ranvier
ADH release controlled by _ nucleus of the hypothalamus
Supraoptic nucleus
SDH are caued by injury to _
Bridging veins
Epidural hematoma cause by injury to _
Middle meningeal artery
Cresent shape on CT scan
SDH
Convex/Lens shape on CT
EDH
Lobe often affected with intracerebral hematomas
Temporal lobe
Cushing triad
HTN
Bradycardia
Decreased resp rate
Most sensitive test for SCI
MRI
3 signs of spinal shock
HoTN
Normo/Bradycardia
Warm extremities (vasodilation)
Bilateral areflexia, flaccidity, parasthesias
Complete cord transection
Bilateral loss of motor, pain and temperature below level of lesion; preservation of position/vibratory sensation and light touch
Anterior cord syndrome
Loss of ipsilateral motor and contralateral pain/teperature below level of lesion
Brown-sequard syndrome (Hemisection)
Bilateral loss of pain, motor, and temperature sensation in upper extremities (lower spared)
Central cord syndrome
Pain and weakness in lower extremities 2/2 lumbar nerve compression
Cauda (equina
Tract that carries pain and temperature sensory fibers
Spinothalamic (dorsal)
Tracts (2) that carries motor neurons
Corticospinal and rubrospinal
Afferent nerve root, sensory fibers
Dorsal nerve roots
Efferent nerve root, motor fibers
Ventral nerve roots
Most common PRIMARY brain tumor
Gliomas
Most common subtype of glioma; fatal
Glioma multiforme
1 metastasis to brain
Lung Ca
Most common brain tumor in children
Medulloblastoma
Most common metastatic brain tumor children
neuroblastoma
Acoutstic neuroma arises from _ cranial nerve at cerebellopontnie angle
8th
1 spinal tumor
Neurofibroma
_ spinal tumors are most likely benign
Intradural
_ spinal tumors are most likely malignant
Extradural
Brain bleeding type seen in premature infants
Intraventricular hemorrhage
Herniation of spinal cord and nerve roots through defect in vertebra
Myelomeningocele
Speech comprehension, temporal lobe
Wernicke’s
Speed motor, posterior part of anterior lobe
Broca’s
Acts as brain macrophages
Microglial cells
Cranial nerve function/muscle of smell
1 - olfactory
Cranial nerve function/muscle of sight
2 - optic
Cranial nerve function/muscle of motor to eye
3 - oculomotor
Cranial nerve function/muscle of sensory to face; muscle of mastication
5 - trigeminal
Cranial nerve function/muscle of superior oblique of eye
4 - trochlear
Cranial nerve function/muscle of lateral rectus to eye
6 - abducens
Cranial nerve function/muscle of taste ant 2/3 of tongue; motor to face
7 - facial
Cranial nerve function/muscle of hearing
8 - vestibulochochlear
Cranial nerve function/muscle of taste to posterior 1/3 tongue; swallowing
9 - glossopharyngeal
Cranial nerve function/muscle of many functions
10 - vagus
Cranial nerve function/muscle of trapezius, SCM
11 - spinal accessory
Cranial nerve function/muscle of tongue
12 - hypoglossal