Aspiration Method Choice for Brain Lesions
Aspiration is a surgical technique involving suction to remove material. Its suitability as a primary method for creating a lesion depends heavily on the lesion's location and characteristics.
Lesion Location and Aspiration Suitability
- Cerebral Cortex: Aspiration is often a preferred method for lesions situated in the cerebral cortex. This area is relatively accessible, and aspiration can be used effectively and minimally invasively to address certain types of lesions, such as superficial cysts or small tumors, by removing their contents.
- Deeper Brain Areas: For lesions located in deeper brain areas, aspiration might be more challenging or less suitable due to the depth and surrounding sensitive structures. Alternative techniques like stereotactic procedures might be necessary.
- Underlying White Matter: While aspiration can be used in white matter, the approach and rationale might differ based on the specific lesion type and precise location within the white matter tracts.
- Irreversible Lesion: The concept of an 'irreversible lesion' describes the nature or consequence of a condition, not the criteria for selecting a surgical method like aspiration. Aspiration is a tool to *create* or *modify* a lesion, regardless of its potential irreversibility.
Therefore, the accessibility and superficial nature of the cerebral cortex make aspiration a particularly suitable choice for lesion creation in that specific brain region.
Important Questions from System Physiology Animal
Which one of the following synaptic vesicles (as observed under transmission electron microscope) contains catecholamines?
Blood hemostasis is the interplay of several intrinsic and extrinsic factors. Deficiency of some of the blood clotting factors and their clinical manifestations are listed below.
Factors
Manifestations
A.
V
i.
Hageman trait
B.
VII
ii.
Hypoconvertemia
C.
IX
iii.
Hemophilia B
D.
XII
iv.
Parahemophilia
Which one of the following options represents all correct matches?
Columns X and Y list the terms associated with gametogenesis and fertilisation.
Column X
Column Y
A
Primordial germ cells
i
Luteinizing hormone
B
Dictyate resting stage
ii
Posterior epiblast
C
Sodium channels
iii.
Male pronuclei
D
Protamines
iv
Block polyspermy
Which one of the following options represents all correct matches?
Nephrons are structural and functional units of the kidneys. Certain statements are made below about structure and function of a nephron.
A. P cells of the collecting duct are involved in Na+ reabsorption and vasopressin-stimulated water reabsorption.
B. P cells of the collecting duct are concerned with acid secretion and HCO3- transport.
C. I cells of the collecting duct are concerned with acid secretion and HCO3- transport.
D. The total length of the nephrons including collecting ducts ranges from 45 to 65 mm.
Which one of the following options has all correct statements?
The non-ciliated cuboidal epithelial cells in bronchioles that secrete important defense markers are called
