1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vekshin1
2 years ago
7

Kinetics of the cervical spine

Biology
1 answer:
netineya [11]2 years ago
3 0

Answer:

Previous research has quantified differences in head and spinal kinematics between children and adults restrained in an automotive-like configuration subjected to low speed dynamic loading. The forces and moments that the cervical spine imposes on the head contribute directly to these age-based kinematic variations. To provide further explanation of the kinematic results, this study compared the upper neck kinetics - including the relative contribution of shear and tension as well as flexion moment - between children (n=20, 6-14 yr) and adults (n=10, 18-30 yr) during low-speed (<4 g, 2.5 m/s) frontal sled tests. The subjects were restrained by a lap and shoulder belt and photo-reflective targets were attached to skeletal landmarks on the head, spine, shoulders, sternum, and legs. A 3D infrared tracking system quantified the position of the targets. Shear force (F(x)), axial force (F(z)), bending moment (M(y)), and head angular acceleration (θ(head)) were computed using inverse dynamics. The method was validated against ATD measured loads. Peak F(z) and θ(head) significantly decreased with increasing age while M(y) significantly increased with increasing age. F(x) significantly increased with age when age was considered as a univariate variable; however when variations in head-to-neck girth ratio and change in velocity were accounted for, this difference as a function of age was not significant. These results provide insight into the relationship between age-based differences in head kinematics and the kinetics of the cervical spine. Such information is valuable for pediatric cervical spine models and when scaling adult-based upper cervical spine tolerance and injury metrics to children.

You might be interested in
The Baltic Sea has very low dissolved oxygen content. What kind of condition prevails in this sea?
bonufazy [111]

The answer is; Dead Zone

These areas have anoxic condition means they have very little to zero dissolved oxygen hence cannot support marine/aquatic life. This is as a result of eutrophication  caused by algae blooms. This phenomenon is brought about by pollution of these water reservoirs. These algae bloom take up all the oxygen in the water during their mass decomposgion hence leave no dissolved oxygen for the rest of the marine life.


4 0
3 years ago
Read 2 more answers
How many hours does the average newborn sleep in a 24 hour period?
trasher [3.6K]
The average newborn sleep 16-18 hours in a 24 hour period.
3 0
3 years ago
This is the act of trying to find the answer to an unknown question by the use of experimentation and research.
Vikentia [17]

Answer:

Question Answer

Inquiry This is the act of trying to find the answer to an unknown question by the use of experimentation and research.

Investigation This is the process of researching or studying a concept. Examination, inquiry

Explanation:

7 0
2 years ago
Similarities and differences between arteries and veins
nika2105 [10]

Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation. Arteries and veins are two of the body's main type of blood vessels.

8 0
2 years ago
What type of bonding allows for cohesion and adhesion?
Korolek [52]
Hydrogen bonds allow for cohesion and adhesion. Think water properties
6 0
3 years ago
Other questions:
  • Locust trees are tall trees that first grew on Earth during the time of the dinosaurs. They have an adaptation that prevented th
    7·2 answers
  • Major consequence of ozone depletion is that
    10·2 answers
  • During the 1980s, iran and iraq _____.
    12·2 answers
  • Which describes the correct paring of DNA?
    12·1 answer
  • DNA is sometimes called the blueprint of life. why do you think that is?
    6·1 answer
  • Why do cells undergoing mitosis require one set of divisions, whereas those undergoing meiosis require two sets of divisions? wh
    11·1 answer
  • What kind of bond exists between two amino acid in polypeptide
    5·2 answers
  • Which cell division is pictured?
    14·1 answer
  • Which of the following best describes average speed?
    10·2 answers
  • The Earth’s crust is _____________ enough to sustain _____________.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!