Related Experiment Video
Updated: Aug 1, 2026
10:02
State of the Art Cranial Ultrasound Imaging in Neonates
Published on: February 2, 2015
Summary
Human teeth cusps are not an aberration from modern diets. Instead, cusps are vital adaptations for efficiently breaking down specific food types, contrary to claims of unnecessary retention.
Area of Science:
- Paleoanthropology
- Mammalian Anatomy
- Dental Morphology
Background:
- The prolonged retention of cusps in human dentition is debated.
- Modern diets' low abrasiveness is cited as a reason for this retention.
- Some propose teeth should wear down like in herbivorous mammals for health.
Purpose of the Study:
- Critically review evidence supporting the idea of unnecessary cusp retention.
- Discuss occlusal surface design in various mammalian diets.
- Determine the adaptive function of dental cusps.
Main Methods:
- Literature review of existing evidence.
- Comparative analysis of mammalian occlusal surface design.
- Examination of dietary adaptations in dentition.
Main Results:
- Evidence for prolonged cusp retention being a recent aberration is critically examined.
- Occlusal surface design varies significantly across mammalian diets.
- Cusps are not solely a result of diet abrasiveness.
Conclusions:
- Cusps are not an aberration but specific adaptations.
- Dental cusps are crucial for breaking down foods with particular physical properties.
- The function of cusps is linked to food mechanics, not just diet wear.
More Related Videos
10:23Three-Dimensional Cephalometric Landmark Annotation Demonstration on Human Cone Beam Computed Tomography Scans
Published on: September 8, 2023
07:59Alignment of Synchronized Time-Series Data Using the Characterizing Loss of Cell Cycle Synchrony Model for Cross-Experiment Comparisons
Published on: June 9, 2023
Related Concept Videos
01:22Microtubules in Signaling
The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
01:15Routh-Hurwitz Criterion I
Consider an electrical power grid, where stability is essential to prevent blackouts. The Routh-Hurwitz criterion is a valuable tool for assessing system stability under varying load conditions or faults. By analyzing the closed-loop transfer function, the Routh-Hurwitz criterion helps determine whether the system remains stable.
To apply the Routh-Hurwitz criterion, a Routh table is constructed. The table's rows are labeled with powers of the complex frequency variable s, starting from the...
To apply the Routh-Hurwitz criterion, a Routh table is constructed. The table's rows are labeled with powers of the complex frequency variable s, starting from the...
01:25Limits on Trigonometric Functions
Limits on Trigonometric FunctionsThe limits of trigonometric functions play a fundamental role in calculus, particularly in defining derivatives. One of the most important results is:which is important for differentiating trigonometric functions and is widely applied in mathematical analysis and physics.Geometric IntuitionA common approach to proving this result involves analyzing a sector of a unit circle with an angle subtended at the center. Since the arc length is numerically equal to the...
01:30Trigonometric Functions of Real Numbers
The unit circle—a circle with a radius of one, centered at the origin of the coordinate plane—serves as the foundational framework for defining trigonometric functions. In this context, arc length refers to the distance measured along the circumference of the circle between two points, and it provides a way to represent real numbers geometrically. Each real number t corresponds to an arc length measured counterclockwise from the positive x-axis around the circle. The coordinates of a point on...
01:30Graphs of Trigonometric Functions
Trigonometric functions exhibit periodic and symmetrical behavior, deeply rooted in the unit circle. The sine and cosine functions correspond to the vertical and horizontal projections, respectively, of a point rotating counterclockwise around the circle. These functions trace smooth, repeating waveforms with identical periods and bounded ranges. The tangent function is defined as the ratio of sine to cosine and produces an unbounded curve that repeats every units, with vertical asymptotes...
01:27Trigonometric Identities III
Cofunction identities are a key concept in trigonometry. They describe how trigonometric functions relate when their input angles are complementary — meaning the angles add up to 90°. On the unit circle, every angle θ— measured counterclockwise from the positive x-axis — corresponds to a point with coordinates (cos θ, sin θ). These values represent the horizontal and vertical components of the terminal side of the angle.If the same point on the unit circle is instead described using the...