High-resolution 4-D acquisition of freely swimming human sperm cells ...
Live human sperm cells were acquired during free swim using a high-speed off-axis holographic system that does not require any moving elements or cell staining. The reconstruction is based solely on the natural movement of the sperm cell and a novel set of algorithms, enabling the detailed four-dimensional recovery.
Sperm cells are extremely efficient at swimming against a current
2014年5月27日 · Like salmon traveling upstream to spawn, sperm cells are extremely efficient at swimming against the current, according to research to be published this week. The discovery, to be published in the journal eLife by researchers at MIT and Cambridge University, may help us to understand how some sperm travel such long distances, through difficult ...
Model Suggests That Mammalian Sperm Cells Have Two Modes of Swimming
2023年11月9日 · The researchers’ new model of a swimming sperm cell captures the interactions between its motor kinetics and changes in the shape (deformations) of the flagella as well as the movements of the head of the sperm cell. The model also accounts for the complex fluid mechanics around the sperm cell as it moves.
Video of Model That Suggests That Mammalian Sperm Cells Have …
2023年11月8日 · A new mathematical model predicts that mammalian sperm cells have two distinct swimming modes. This prediction opens new questions about potential connections between sperm cells’ motor activity and their transitions to hyperactivation phases that may play an important role in fertilization.
Sperm cells are extremely efficient at swimming against a …
2014年5月27日 · Like salmon traveling upstream to spawn, sperm cells are extremely efficient at swimming against the current, according to new research. The discovery may help us to understand how some...
New Genetic Variations Discovered in Swimming Behavior of Sperm Cells
2022年11月15日 · A new study that centered on the swimming behavior of sperm cells is the first to establish a direct effect of mutation on sperm behavior. It suggests that the development and application of screens based on sperm behavior can improve the quality of …
Model suggests that mammalian sperm cells have two modes of swimming
2023年11月6日 · Video of a new mathematical model that predicts that mammalian sperm cells have two distinct swimming modes. This prediction opens new questions about potential connections between sperm...
Hydrodynamics of Sperm Cells near Surfaces - PMC - National …
2010年8月9日 · When confined between two parallel walls, sperm swim either in circles or on curvilinear trajectories close to the walls. We employ mesoscale hydrodynamics simulations in combination with a mechanical sperm model to study the swimming behavior near walls.
Swimming by Spinning: Spinning‐Top Type Rotations Regularize Sperm …
2024年12月18日 · Results show that sperm rotation regularizes the swimming motion, allowing persistently progressive swimming even with asymmetrical flagellar beats. Crucially, 3D sperm head orientation, rather than the swimming path, provides critical …
Upward swimming of a sperm cell in shear flow - Physical Review …
2016年3月8日 · This work investigates the mechanism of the rheotaxis in detail by simulating the motions of a sperm cell in shear flow adjacent to a flat surface. A phase diagram was developed to show the sperm's swimming motion under different shear rates, and for varying flagellum waveform conditions.