Argyll-Robertson Pupil features |
Look at the math signs around the two parts of the name: A-R.
The A has no sign in front, which in math means +A (+ Accommodate).
There is a subtract sign in front of the R (- React).
Therefore, pupil can accommodate, but can't react.
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---Robert O'Connor University College Dublin
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Spinal cord: converting ventral/ anterior/ motor/ efferent and dorsal/ posterior/ sensory/ afferent |
A limousine:
The motor of limo is ventral and anterior on the car.
The Aerial is sensory and on the dorsal and posterior of the limo.
· Note 1: 'A' is Afferent, and also, in a limo, the aerial on the top of the trunk has a capital 'A' shape.
· Note 2: An aerial is a sensory thing: picks up radio waves.
· Note 3: If picked a limo up in your hand, can only see motor on ventral, since dorsal is covered by the hood/bonnet.
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---Robert O'Connor University College Dublin
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Optic chiasma: what it looks like if you're a genetics star |
The optic chiasma looks the same as a chiasma in meiosis, making it easy to spot on the dissected brain.
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---Anonymous Contributor
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Parasympathetic vs. sympathetic function |
Sympathetic nervous system: "Fight or Flight".
Parasympathetic nervous system: "Rest and Digest".
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---Anonymous Contributor
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Chemoreceptor trigger zone |
"Syringes Help Men On Drugs":
Serotonin
Histamine
Muscarinic
Opioids
Dopamine
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---Anonymous Contributor
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Cerebellar damage symptoms |
VANISHeD:
Vertigo
Ataxia
Nystagmus
Intention tremor
Slurred speech
Hypotonic reflexes
Dysdiadochokinesia.
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---Anonymous Contributor
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Hypothalamus: feeding vs.satiety center |
"Late night snack":
LATEral is snacking [feeding] center.
Therefore, ventromedial is satiety center.
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---Robert O'Connor University College Dublin
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Spinal tracts: simplified geography |
2 posterior: cross at the medulla.
2 lateral: ipsilateral (same side).
2 anterior: cross at the spinal level.
· See diagram.
· Note 1: Descending tracts on left of figure, ascending tracts on right.
· Note 2: For ipsilaterals: one never crosses, one crosses at the level then doubles back farther up. The ipsilateral that crosses at the level (ventral spinocerebellar) is the ipsilateral closest to the 2 anterior ones, which also cross at the level.
· Tract names in each group:
Posterior 2: lateral corticalspinal, dorsal columns. Lateral 2: dorsal spinocerebellar, ventral spinocerebellar. Anterior 2: ventral corticospinal, spinothalamic.
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---Robert O'Connor University College Dublin
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Spinal tracts: Gracilus vs. Cuneatus: origin from upper vs. lower limbs |
Gracilus is the name of a muscle in the legs, so Fasciculus Gracilus is for the lower limbs.
By default, Fasciculus Cuneatus must be for upper limbs.
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---Jason Galarneau Flinders University
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Precentral vs. postcentral gyrus: motor vs. sensory |
Just an extension of the rule that anterior = ventral = efferent = motor.
The precentral gyrus is on the anterior side of the brain, so is therefore motor.
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---Robert O'Connor University College Dublin
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