1.1 Anatomy And Physiology Flashcards
What is the definition of articulating bones?
Where two or more bones come together to form a joint
What are the articulating bones at the shoulder?
Scapula and Humerus
What are the articulating bones at the elbow?
Humerus, Radius and Ulna
What are the articulating bones at the wrist?
Ulna, Radius and Carpals
What are the articulating bones at the hip?
Pelvis and Femur
What are the articulating bones at the knee?
Femur and Tibia
What are the articulating bones at the ankle?
Tibia and Talus
What is the definition of a joint?
Where bones come together to allow movement of the skeleton, includes connective tissue and cartilage
What is a ball and socket joint?
- a ball shaped head of one bone articulate with a cup like socket of another
- movement occurs on three planes
- allows greatest range of movement
What is a hinge joint?
- a cylindrical protrusion of one bone articulates with a trough-shaped depression on another
- movement occurs on one plane
- bending and straightening only
What is a condyloid joint?
- similar to a ball and socket joint but flatter surfaces
- movement occurs on two planes
- allows second greatest range of movement
What is the joint type at the shoulder?
Ball and Socket Joint
What is the joint type at the elbow?
Hinge Joint
What is the joint type at the wrist?
Condyloid Joint
What is the joint type at the hip?
Ball and Socket Joint
What is the joint type at the knee?
Hinge Joint
What is the joint type at the ankle?
Hinge Joint
What is the definition of flexion?
A decrease in the angle that occurs around a joint
What is the definition of extension?
An Increase in the angle that occurs around a joint
What is the definition of plantar flexion?
Pointing of the ankle downwards away from the tibia
What is the definition of dorsi flexion?
Pointing of the ankle upwards towards the tibia
What is the definition of abduction?
A movement away from the midline of the body
What is the definition of adduction?
Movement towards the midline of the body
What is the definition of horizontal flexion?
Movement across the body towards the midline, parallel to the floor
What is the definition of horizontal extension?
Movement across the body away from the midline, parallel to the floor
What is the definition of medial rotation?
Inward movement of a bone about its axis inwards
What is the definition of lateral rotation?
Outward movement of a one about its axis outward
What is circumduction?
Circular movement of a body part, its a combination of flexion, extension, abduction and adduction
What are the 3 planes of movement?
Transverse
Frontal
Sagittal
What is the transverse plane?
- rotation occurs around the longitudinal axis
- eg, throwing a discus
- horizontal flexion and extension
What is the frontal plane?
- divides the body into front and back
- movements are towards or away from the midline of the body
- adduction and abduction of the shoulder and hip
- eg, cartwheel
What is the sagittal plane?
- divides the body into left and right halves
- flexion and extension
- eg, knee joint when striking a football
What is the definition of a agonist?
The muscle which is directly responsible for the movement of a joint
What is the definition of an antagonist?
A muscle that has an action opposite to the agonist and helps in the production of coordinated movement
What is the definition of a fixator?
A muscle which stabilises the origin of the agonist so that the agonist can pull against the bone
What’s the antagonist and agonist when there’s flexion at the shoulder?
agonist: anterior deltoid
antagonist: posterior deltoid
What’s the antagonist and agonist when there’s extension at the shoulder?
agonist: posterior deltoid
antagonist: anterior deltoid
What’s the antagonist and agonist when there’s abduction at the shoulder?
agonist: middle deltoid
antagonist: latissimus dorsi
What’s the antagonist and agonist when there’s adduction at the shoulder?
agonist: latissimus dorsi
antagonist: middle deltoid
What’s the antagonist and agonist when there’s horizontal flexion at the shoulder?
agonist: pectoralis major
antagonist: trapezius
What’s the antagonist and agonist when there’s horizontal extension at the shoulder?
agonist: trapezius
antagonist: pectoralis major
What’s the antagonist and agonist when there’s medial rotation at the shoulder?
agonist: infraspinatus
antagonist: teres major
What’s the antagonist and agonist when there’s lateral rotation at the shoulder?
agonist: teres major
antagonist: infraspinatus
What’s the antagonist and agonist when there’s flexion at the elbow?
agonist: biceps brachii
antagonist: triceps brachii
What’s the antagonist and agonist when there’s extension at the elbow?
agonist: triceps brachii
antagonist: biceps brachii
What’s the antagonist and agonist when there’s flexion at the wrist?
agonist: wrist extensor
antagonist: wrist flexor
What’s the antagonist and agonist when there’s extension at the wrist?
agonist: wrist flexor
antagonist: wrist extensor
What’s the antagonist and agonist when there’s flexion at the hip?
agonist: illiopsoas
antagonist: gluteus maximus
What’s the antagonist and agonist when there’s extension at the hip?
agonist: gluteus maximus
antagonist: illiopsoas
What’s the antagonist and agonist when there’s adduction at the hip?
agonist: adductor group
What’s the antagonist and agonist when there’s abduction at the hip?
agonist: gluteus medius and minimus
antagonist: adductor group
What’s the antagonist and agonist when there’s medial rotation at the hip?
agonist: gluteus medius and minimus
antagonist: gluteus maximus
What’s the antagonist and agonist when there’s lateral rotation at the hip?
agonist: gluteus maximus
antagonist: gluteus medius and minimus
What’s the antagonist and agonist when there’s flexion at the knee?
agonist: biceps femoris
antagonist: rectus femoris
What’s the antagonist and agonist when there’s extension at the knee?
agonist: rectus femoris
antagonist: biceps femoris
What’s the antagonist and agonist when there’s plantar flexion at the ankle?
agonist: soleus and gastrocnemius
antagonist: tibialis anterior
What’s the antagonist and agonist when there’s dorsi flexion at the ankle?
agonist: tibialis anterior
antagonist: soleus and gastrocnemius
What is concentric contraction?
- shortening of the muscle
- joint angle decreases
- causes flexion
What is eccentric contraction?
- lengthening of the muscle
- joint angle increases
- controls extension
What is isometric contraction?
- no change in length
- joint angle remains constant
- stops flexion and extension