Neuro Flashcards
(137 cards)
- Name the structure?
- What type of stimuli is the structure responsible for processing?
- Pulvinar part of thalamus
- Visual
- Name the structure?
- What artery supplies this structure?
- What is the specific embryonic origin of this structure?
- What substances are produced by this structure?
- What is the function of this structure?
- Pineal Gland/ body
- Posterior Cerebral artery
- Neural ectoderm; root of Diencephalon
- Melatonin and Serotonin
- Maintains circadian rhythms
Melatonin controls sleep wake function of body
Serotonin in synthesised by tryptophan, its a neurotransmitter that important in happiness and well being.
Also play in role in auditory hallucinations in temporal lobe of brain in schizophrenics.
- Name the structure?
- This structure is associated with which sensory pathway?
- Superior colliculi
- Visual sensory
Superior Colliculi aka Optic tectum.
Part of midbrain.
Superficial layers are sensory (eyes)
Deep layers are motor (eves)
- Name the structure?
- This structure is associated with which sensory pathway?
- What are the three subdivisions of this structure?
- Inferior Colliculus
- Auditory pathway
- Central Nucleus, dorsal cortex, external cortex
- Name the structure?
- What tracts are specific to the medial, middle and lateral aspect of this structure?
- Crus Cerebri
- Medial - frontopontine, middle - corticonuclear, corticospinal, lateral - temperopontine, occipitopontine, parietopontine
Frontal cortex is medial to brain so frontopontine is medial
Temporal lobe is lateral so temperopontine
- Name the structure?
- Where is the nucleus of this structure located?
- What is the specific structure targeted by this nerve?
- Trochlear nerve CN4
- Midbrain, level of Inferior Colliculus
- Superior Oblique Muscle, passing through superior orbital fissure
Trochlear Nerve:
Contains least # of axons
Has greatest intrcranial length
Only nerve on dorsal aspect of brainstem
Only cranial nerve innervating a muscle on contralateral side.
- Name the structure?
- The efferents conveyed by this structure are derived from which three nuclei?
- This structure connects which two structures in the CNS?
- Superior Cerebellar Peduncle
- Dentate, emboliform, globose
- Midbrain to cerebellum
- Name the structure?
- What fibers run through this structure?
- This structure connects which two structures in the CNS?
- Middle Cerebellar Peduncle
- Centripetal fibers from pontine nucleus
- Pons to cerebellum
- Name the structure?
- What fibers run through this structure?
- This structure connects which two structures in the CNS?
- Inferior Cerebellar Peduncle
- Dorsal Spinocerebellar, axons of inferior olivary nucleus
- Medulla to cerebellum
Sensory Decussation of Gracile and Cuneate Leminiscus
Superior to motor decussation
Motor Decussation
The two pyramids contain the motor fibers that pass from the brain to the medulla oblongata and spinal cord.
These are the corticobulbar and corticospinal fibers that make up the pyramidal tracts.
About 90% of these fibers leave the pyramids in successive bundles and decussate (cross over) in the anterior median fissure of the medulla oblongata as the pyramidal decussation or motor decussation.
Having crossed over at the middle line, they pass down in the posterior part of the lateral funiculus as the lateral corticospinal tract. The other 10% of the fibers stay uncrossed in the anterior corticospinal tract. The pyramidal decussation marks the border between the spinal cord and the medulla oblongata. [1]
- Name the structure?
Striae Medullares
Winding around the inferior peduncle in the lower part of the fourth ventricle, and crossing the area acustica and the medial eminence are a number of white strands, the medullary striae, which form a portion of the cochlear division of the vestibulocochlear nerve and disappear into the median sulcus.
Name the structure?
Hypoglossal Triangle
- Name the structure?
Vagal Triangle
- Name the structure?
- This structure acts as a relay between which two structures?
- This structure is associated with which sensory system?
- This structure is supplied by which artery?
- Medial geniculate body
- Inferior Colliculi and Auditory Cortex
- Auditory
- Striata arteries; from middle cerebral arteries
- Name the structure?
- This structure acts as a relay between which two structures?
- This structure is associated with which sensory system?
- This structure is supplied by which two arteries?
- This structure is drained by which vein?
- Lateral Geniculate Body
- Superior Colliculus and Visual Cortex
- Visual
- Anterior Choroidal, Posterior cerebral
- Terminal Vein
- Name the structure?
- What substance is principally synthesised in this structure?
- This structure is associated with what type of response?
- Locus Coeruleus
- Norepinephrine
- LC receives input from Medial PFC, Hypothalamus, Outputs to amygdala, hippocampus, cerebellum etc
- Name the structure?
- This structure is associated with what neural structures?
- A lesion on this structure would result in what type of abnormality on which structures, state if it would be ipsi /contralateral?
- Facial Colliculus
- Motor nucelus of facial nerve
- Ipsilateral facial paralysis, unopposed eye medial deviation
- Name the structure?
- This structure is associated with what tract of which nerve?
- Tuberculum Cinereum
- Spinal tract of trigeminal nerve
Tuberculum Cinereum
C uneate Tubercle
Gracile tubercule
- Name the structure?
- The sensation carried by this pathway is responsible for what type of sensory information?
- This structure receives sensory information from the level of what vertebrae, state whether superior or inferior to the level.
- What structures in field specified above does not carry sensory information to this structure?
- Cuneate Tubercle
- Propioception, fine touch, vibration
- Superior to T6
- Face and ear
Dorsal ascending tract;
Neurohighway of sorts, fast conduction, heavily myelinated nerves
- Name the structure?
- This pathway is responsible for what type of sensory information?
- This structure receives sensory information from the level of what vertebrae, state whether superior or inferior to the level.
- Gracile Tubercle
- Propioception, fine touch, vibration
- Inferior to T6
Dorsal ascending tract;
Neurohighway of sorts, fast conduction, heavily myelinated nerves
- Name the structure?
- The sensation carried by this pathway is responsible for what type of sensory information?
- This structure ascends form which aspect of the spinal cord?
- This structure receives sensory information from the level of what vertebrae, state whether superior or inferior to the level.
- Fasciculus Cuneatus
- propioception, fine touch, vibration
- Dorsal
- Superior to T6
Fasciculus is round grouping of nerve fibres
Leminiscus is flat grouping of nerve fibres
Tubercle may describe a round nodule, small eminence
- Name the structure?
- The sensation carried by this pathway is responsible for what type of sensory information?
- This structure ascends form which aspect of the spinal cord?
- This structure receives sensory information from the level of what vertebrae, state whether superior or inferior to the level.
- Fasciculus Gracalis
- propioception, fine touch, vibration
- Dorsal
- inferior T6
- Name the structure?
- This structure is supplied by which artery?
- Dentate Nucleus
- Superior Cerebellar Artery