Councilman Chisel
Councilman Chisel - Related Videos
04:47
Ring-Shaped Micropatterning Cell Chirality Assay: An In Vitro Technique to Determine Multicellular Chirality Based on Cell Alignment on Ring-Shaped Micropatterns
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2025
In this video, we describe a cell chirality assay to determine the alignment bias of cells in a confined geometric boundary such as a ring micropattern. Chirality is an inherent property of most cell types and is determined by genetic and environmental factors. Knowing the chirality of a normal cell population can help to screen drug-treated cells.
08:07
A Micropatterning Assay for Measuring Cell Chirality
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Cited by 5 •
2022
We present a protocol for determining multicellular chirality in vitro, using the micropatterning technique. This assay allows for automatic quantification of the left-right biases of various types of cells and can be used for screening purposes.
02:25
Chirality
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2023
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot. Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
02:30
Chirality in Nature
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2023
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid. The...
02:25
Molecules with Multiple Chiral Centers
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2023
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
FAQs
The beveled edge concentrates applied force over a narrow contact area rather than distributing it broadly across the bone. This concentration supports controlled separation of cranial bone and can help the operator direct the cut more precisely. The mechanism matters because limiting the cutting area may reduce unnecessary bone damage while creating the access needed for a neurosurgical procedure.
The method of advancement depends on the instrument’s design and the amount of force needed for the task. A mallet can deliver an advancing impact, whereas hand application allows direct manual control when less force or more gradual manipulation is appropriate. Recognizing this distinction helps match handling to the intended bone-cutting action.
A Councilman chisel provides a manually directed cutting action through its beveled edge, while powered instruments use mechanical power and rongeurs remove bone through a different grasping action. The overview indicates that modern powered tools and rongeurs may be preferred for some procedures. Thus, instrument selection depends on the surgical task and the desired approach to bone removal.
It can assist when the procedure requires cranial bone to be cut or removed to create access to intracranial structures. In these settings, the chisel supports the bony portion of the operation rather than addressing the intracranial structures directly. Its usefulness lies in providing a controlled means of separating or removing bone as the surgical exposure is established.
Shaping or removing bone becomes relevant when the skull must be modified to expose the operative area or accommodate the intended surgical access. The Councilman chisel can support that work by allowing targeted manipulation of cranial bone. In neuroscience-related procedures, this connects the instrument’s mechanical function with the broader goal of reaching intracranial structures.
Proper handling helps the operator control how force reaches the cranial bone and where separation occurs. That control can limit unnecessary bone damage during access creation or bone shaping. Although other instruments may be selected for particular procedures, careful use of the chisel remains relevant when its controlled cutting action is appropriate for the planned neurosurgical task.