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What does the first vertebra pivot around when head moves side to side?
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∙ 13y ago
dens
Wiki User
∙ 13y ago
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Why does the head pivots on the second vertebrae?
The second vertebrae has a dens (meaning tooth) which sticks up into the ring made by the atlas (the first vertebra). The head can pivot with this type of joint. A person can nod the head "no".
What is a zygantrum?
A zygantrum is a cavity on the vertebrae of snakes and some lizards which helps fit a pivot joint called a zygosphene inside each vertebra.
What kind a motion does a pivot joint have?
rotationUNIAXIAL ROTATIONyesThe pivot joint moves by twisting and rotating around.It is located at the neck and lower arm. The pivot joint is one of the four types of the moveable joints.The only immovable joint is at the skull. :)moveRotationuniaxial rotationUniaxial rotationA pivot joint permits lateral rotation or side to side movement. An example of this type of joint in your body is the C2 vertebra, called axis. The axis (a pivot joint) allows you to shake your head to indicate no.movement allowed in a pivot joint is known as?
Calcaneus and talus an example of a pivot joint?
The calcaneus and the talus or not an example of a pivot joint. There is a pivot joint in the neck between the first and second cervical vertebrae. Another pivot joint is between the radius in the ulna at the wrist.
What is the function of the atlas joint?
Atlantoaxial - synovial; pivotThe joint between the atlas and axis is called the atlanto-axial joint. It is comprised of the anterior portion of the ring of C1 and the odontoid process (or dens) of C2. This joint allows for about 50 percent of the side to side rotation of the head.*a.k.a. Pivot Synovial JointThe joint that is located between the atlas and the axis vertebrae is the pivot joint. This is due to the fact that the axis (2nd vertebra) protrudes through the vertebral foramen and this allows you to turn your head side to side. Try and shake your head "no," this is due to the pivot joint of the two vertebrae! this joint also known as atoaxoid jointpivotit is called the atlanto-axial jointThe joint between atlas and axis is called the atloaxoid joint. This joint is a pivot joint that allows the head to turn from side to side.
What provides a pivot for the rotation of the first cervical vertebra?
Atlaswrong . the correct answer is axis (http://en.wikipedia.org/wiki/Axis_(anatomy)) "It forms the pivot upon which the first cervical vertebra (the atlas), which carries the head, rotates."
Dens here provides a pivot for rotation of the first cervical vertebra?
Atlaswrong . the correct answer is axis (http://en.wikipedia.org/wiki/Axis_(anatomy)) "It forms the pivot upon which the first cervical vertebra (the atlas), which carries the head, rotates."
Can a pivot joint be found in the spine?
Yes in between atlas and axis lets you shake your headAnswerI was just thinking that, though I thought a pivot joint would be a little more obvious.its called the dens, and its on the axis
What is the pivot part of a lever?
The fulcrum is the pivot part of a lever.
Which vertebra has a dens?
The axis has a dens, which provides a pivot for the atlas.
What is a moving pivot?
A moving pivot is a pivot that moves
Why are pivot joints called pivot joints?
Pivot means to turn. A pivot joint turns around a ring. The best example is the ring of bone that the atlas vertebra makes and the "finger" of the dens vertebra. The joint allows us to turn our heads. The atlas holds the head. In mythology Atlas held the world on his shoulders. The dens is called this because it has a "tooth" like structure. (dens as in dental).
What is an example of a pivotal joint?
The very best example of a pivot joint is the axis and atlas in the spinal column. This involves the very first two vertebra which allow you to turn your head from side to side.
What is a example of pivot joint?
The very best example of a pivot joint is the axis and atlas in the spinal column. This involves the very first two vertebra which allow you to turn your head from side to side.
What is a 'pivot' in a mountain bike?
Pivot is simply tech speak for a joint, or a hinge. For a (suspension) MTB pivot usually refers to the point(s) that the rear suspension moves around.
Which joint allows you to turn your head?
pivot is the joint that helps to turn our head.
What cervical vertebra has a tooth-like projection on its superior surface?
The second cervical vertebra (C2), also called the axis, has a projection on it's superior surface called a dens that creates a pivot joint with the vertebra above it (C1), also known as the atlas. The pivot joint between these two vertebra allows 45 degrees of rotation in each direction, which is half the possible rotation of the head.
