What is the axis associated with the frontal plane?
Click to see answer
Antero-posterior (Z axis).
Click to see question
What is the axis associated with the frontal plane?
Antero-posterior (Z axis).
What is the axis associated with the sagittal plane?
Medial-lateral (x-axis).
What does the horizontal or transverse plane divide the body into?
Upper and lower parts.
Which joints are examples of ball and socket joints?
Shoulder and hip.
What characterizes condyloid joints?
Generally spherical convex surface paired with a shallow concave surface.
What does biomechanics focus on?
The application of principles of mechanics to the living human body.
What is rotary or angular motion?
Motion that occurs in a circle around an axis.
What defines an OPEN KINEMATIC CHAIN (OKC)?
The distal segment of the chain moves in space, such as reaching for an object.
What are diarthroses also known as?
Synovial joints.
What type of motion occurs during knee extension from a squatting position?
Glide (slide or translation) as femoral condyles slide backward on the tibia.
What is the resting position of a joint?
The position with the least congruency, where the capsule and ligaments are slack.
What is clinical kinesiology?
The application of kinesiology to environments of the health care professional.
When are ligaments typically loosest or most slack?
When the joint is positioned near its midrange.
What is the difference between kinetics and kinematics?
Kinetics concentrates on forces that produce or resist movement, while kinematics deals with types of motion without regard for forces or torques.
What is the axis of rotation?
The pivot point for angular or rotary motion.
What does the frontal or coronal plane divide the body into?
Front and back parts.
What happens to a tire skidding across a slick surface with brakes locked?
It experiences a spin.
What is arthrokinematics?
The minute movements occurring within the joint and between the joint surfaces.
What characterizes uniaxial joints?
They move in one plane around one axis and have one degree of freedom.
What defines a CLOSED KINEMATIC CHAIN (CKC)?
The distal segment is fixed while proximal parts move, such as in a chin-up or push-up.
What is the primary purpose of SYNARTHROSES joints?
To offer stability with no movement, bound by fibrous connective tissue.
How are joints named?
By using the names of the two bones that form the joint, typically naming the proximal bone first.
Are ligaments unique for each joint type?
Yes, ligaments are unique for each joint type.
What is a close-packed position in a joint?
The position where joint surfaces match perfectly, maximizing surface contact and tension in ligaments.
What is osteokinematics?
The movements of the bony partners or segments that make up a joint.
What did Da Vinci contribute to the study of kinesiology?
Artistic depictions of the human body and dissections to understand musculature.
What is the maximum number of degrees of freedom a joint can have?
3 Degrees of Freedom.
What tool is used to measure range of motion?
Goniometer.
What does end feel refer to?
The resistance felt when a joint is moved passively to the end of its range of motion.
What does the sagittal plane divide the body into?
Right and left sides.
What is a key characteristic of diarthroses?
Free movement and presence of a joint capsule with an internal cavity.
What is the role of ligaments in SYNDESMOSIS joints?
They connect bones together, such as between the radius and ulna.
What motions occur in the transverse plane?
Medial and lateral rotation, pronation, supination, eversion, inversion, horizontal abduction, adduction, and axial rotation.
Which joints are examples of pivot joints?
Atlas and axis (cervical spine).
Which bones are involved in ellipsoid joints?
Radius and carpal bones.
What is the definition of 'roll' (rock) in arthrokinematics?
A series of points on one articular surface contacts a series of points on another articular surface.
What occurs during compression in joint movements?
Joint surfaces are moved together to approximate each other.
What occurs when a convex joint surface moves on a concave surface?
The convex joint surface slides in the opposite direction to the bone segment’s rolling motion.
What is the anatomical position?
A reference position of the body in a static position, standing erect with feet, knees, body, and head facing forward.
What defines biaxial joints?
They move around two axes and have two degrees of freedom.
What motions occur in the frontal plane?
Abduction, adduction, ulnar and radial deviation, lateral flexion, eversion, and inversion.
What motions occur in the sagittal plane?
Flexion, extension, dorsiflexion, and plantarflexion.
What is osteokinematics?
The movements of bony levers through their ranges of motion, produced by muscles.
What is the preferred joint position in joint mobilization?
Near its midrange.
What characterizes an open-packed or loose-packed position?
Joint surfaces do not fit perfectly, are incongruent, and allow for increased accessory movements.
What did Galileo and Borelli study in relation to kinesiology?
Mathematical expressions of muscle action and the relationship of muscle force and angle of application.
What are the characteristics of OPEN KINEMATIC CHAIN movements?
Highly variable, sacrificing stability for mobility, and producing faster motion than closed chain movements.
How are joints classified based on function?
Into three major groups: Synarthrosis, Amphiarthrosis, and Diarthrosis.
What type of synovial joint allows for the widest range of movement?
Ball and socket joint.
What is the motion capability of ellipsoid joints?
Motion in two planes at right angles.
What is meant by 'spin' in arthrokinematic joint motions?
A single point on one articular surface rotates about a single point (fixed) on another articular surface.
What is the Instantaneous Axis of Rotation?
The center axis of a human joint that moves as the joint position changes, usually following a curvilinear path.
Who studied human skeletons and introduced terms like diarthrosis and synarthrosis?
Aristotle and Hippocrates.
What is clinical goniometry?
A measurement used to define the quantity of joint motion.
What is a key feature of ARTHROKINEMATICS?
It involves the movement of two articulating joint surfaces on each other and is not voluntary.
What is the most common type of joint in the human body?
Synovial joints.
What type of joint allows for rotation in one plane?
Pivot joint.
What is the opposition of the thumb classified as?
A basic arthrokinematic joint motion.
What analogy is used to describe the rolling motion?
A tire rolling across a road surface as in normal driving with good traction.
What is kinesiology?
The study of human motion.
What defines curvilinear motion?
An object travels in a curved path.
What is an example of an EMPTY END FEEL?
A soft end feel in elbow extension due to excessive edema.
What are the three types of end feel?
Soft, firm, and hard.
What type of joint is a SYMPHYSIS?
A cartilaginous joint connected by a disc of fibrocartilage, allowing slight movement.
Which joints are examples of hinge joints?
Knee and elbow.
What is unique about saddle joints?
Each partner has a concave and convex surface oriented perpendicular to each other.
What is an example of 'roll' (rocking) in joint motion?
Knee extension occurring from femoral condyles rolling forward on a tibia as a person stands.
What principle describes the movement of convex and concave joint surfaces?
The Concave and Convex Principle.
What is rectilinear motion?
Movement in a straight line.
What is an EMPTY END FEEL in joint motion?
A pathologic type denoting pain on motion but absence of resistance, differing from the usual end feel.
What type of joint is connected by a disk of fibrocartilage?
Sychondrosis (e.g., pubic symphysis).
What is the composition of the joint capsule in synovial joints?
Fibrous cartilage, ligaments, tendons, muscles, and synovial membranes.
What type of movement do hinge joints allow?
Flexion and extension.
What are examples of condyloid joints?
Metacarpophalangeal joints in hand and foot.
What is pathologic end feel?
An abnormal resistance felt at the end of a joint's range of motion.
What is the axis associated with the transverse plane?
Superior-inferior, vertical, or longitudinal (y-axis).
Are pure translatory movements common in human movement?
No, they are rare.
What does 'slide' (glide, translation) refer to in joint motion?
A specific point on one articulating surface comes in contact with a series of points on another surface.
What is translatory motion?
Motion that occurs along or parallel to an axis, where all points on the moving object travel the same distance, direction, velocity, and time.
What type of motion occurs at intervertebral joints in the spine?
Gliding motion.
What happens during distraction in joint movements?
Joint surfaces are pulled away in traction from each other.