spine kinematics and kinetics

Question 1

interconnected movement between adjacent vertebrae during different motions

Answer 1

coupling

Question 2

when bending forward you lumbar spine might also

Answer 2

slightly rotate

Question 3

the functional unit of vertebral column

Answer 3

motion segment

Question 4

components of vertebral column motion segment

Answer 4

two adjacent bodies, ivd, facet joints

Question 5

three joints of motion segment

Answer 5

1 interbody joint

2 facet joints

Question 6

disc thickness or size

Answer 6

amount of motion

Question 7

facets orientation

Answer 7

direction of motion

Question 8

osteokinematic motions

Answer 8

flexion extension

lateral bending

rotation

Question 9

arthrokinematics of flex-ext

Answer 9

anteroposterior shear or slide

Question 10

arthrokinematics of lateral bending

Answer 10

lateral shear or slide

Question 11

arthrokinematics of rotation

Answer 11

distraction or compression

Question 12

if the superior and inferior facets are oriented in SAGITTAL PLANE

Answer 12

permit flexion and extension

Question 13

if the superior and inferior facets are oriented in FRONTAL PLANE

Answer 13

permits more lateral flexion

Question 14

if the facets are oriented in the TRANSVERSE PLANE

Answer 14

permits more rotation

Question 15

facets are oriented 90 deg, sagittal plane

allows significant flex/ext but LIMITS lateral bending and rotation

Answer 15

lumbar

Question 16

facets are angled backward and medially (60 deg frontal plane)

restricts flexion and extension (compared to cervical) allow some lateral bending and rot

Answer 16

thoracic spine

Question 17

facets are nearly parallel to the frontal plane (45 deg frontal plane/MORE TRANSVERSE)

allows extensive flex/ext lateral bending and rotation in the neck

crucial for head and neck mobility

Answer 17

cervical spine

Question 18

vertebral body during flex

Answer 18

vertebral body ABOVE tilts ANTERIORLY

Question 19

vertebral body during extension

Answer 19

vertebral body ABOVE tilts POSTERIORLY

Question 20

facets during flexion

Answer 20

inferior facet ABOVE slides upwards on the superior facet BELOW

Question 21

facets during extension

Answer 21

inferior facet ABIVE slides downward on suPerior facet BELOW

Question 22

separation of spinous process

widening of intervertebral foramen

anterior portion of annulus fibrosus is compressed

posterior portion of the annulus fibrosus is stretched

Answer 22

flexion

Question 23

approximation of spinous process

narrowing of intervertebral foramen

anterior portion of annulus fibrosus is stretched

posterior portion of annulus fibrosus is compressed

Answer 23

extension

Question 24

above vertebra laterally tilts and translates over below vertebrae

intervertebral foramen widened contralateral to the side of this movement; narrowed on ipsilateral side

annulus fibrosus compressed on the concavity side and stretched on convexity

Answer 24

lateral bending/flexion

Question 25

vertebral column is prone to ff forces

Answer 25

axial compression/distraction shear torsion

Question 26

rotation of spinal column is always couples with

Answer 26

side bending except in atlantoaxial joint

Question 27

discuss lumbropelvic rhythm

Answer 27

first part of bending forward consists of lumbosacral flexion followed by anterior tilting of pelvis and hip joint flexion

Question 28

contracts eccentrically to control lumbopelvic rhythm movement against gravity

Answer 28

erector spinae

Question 29

hip flexors cannot contract concentrically and are balanced by

Answer 29

eccentric contraction of hip extensors