Week 1 sem 2 med1022 Flashcards
Angle
Corner
Border
Edge
Tubercle
Small round projection
Small process
Process
Sticky out bit
Spine
‘Sharp’ pointy projection
Thornlike process
Fossa
Depression or hollow
Eg cubital fossa
Cavity
Empty space
Eg abdominal cavity
Tuberosity
Large rounded prominence on bone
Condyle
Convex part of joint surface
(Upside down U’
Round prominence at the end of a bone, where it articulates wit another bone
Cotyle
Cuplike shaped on end of bone wit articulation wit another bone (ie at joints)
U shaped
Joints of upper limb
Sternoclavicular Acromioclavicular Glenohumeral Humeralulna Humeralradial Proximal radioulna Distal radioulna Radiocarpal Inter-carpal Carpal-metacarpal Intermetacarpal (3) Metacarpal-phalangeal (5) Inter-phalangeal (9)
Axial skeleton
Skull
Sternum
Rib cage
Spinal column
3 spaces in upper limb
Axilla
Cubital fossa
Carpal tunnel
Component of synovial joints
Bones + hyaline cartilage on articular surface
Synovial membrane + fluid
Joint capsule ligaments
Accessory ligaments
Intra-articular disc (sometimes)
Menisci (like intra-articular disc, in knee)
Tendon (only in shoulder at glenohumeral joint)
Coracoclavicular ligaments
Accessory ligaments bw clavicle n scapula
Very strong
6 types of joints mechanically
Spheroidal Hinge Ellipsoid Saddle Pivot Plain
Tubercles, ridges, small fossa
Allow for ligament attachment
Fossa, spine, thickened borders
Allow for muscle attachment
Spatial summation
Pattern formation of limbs relies heavily on this
= the right precursor cells being precisely located at the right embryological stage
Reduction(mutation) of limb-patterning genes
Amelia=Absence of whole limb
Meromelia=absence of part of a limb
Hemimelia= absence of all/part/stunting of the DISTAL half of arm/leg
Adactyly-absence of all digits on limb
Duplication (mutation) of limb-patterning genes
Polydactyl= presence of extra digits or parts of digits
Dysplasia (malformation of limbs)
Phacomelia= short/ill-formed limbs? Syndactyl= digit fusion
Teratogen
Something that causes birth defects/malformation of embryo
Eg warfarin, Thalidomide, alcohol
Teratogen
Something that causes birth defects/malformation of embryo
Eg warfarin, Thalidomide, alcohol, aspirin, caffeine, marijuana/cocaine etc
Eg Lead, Mercury, polychlorinated biphenols
Recurring issues in human development
Nature vs nurture (nurture=environment, upbringing, education etc)
Continuity vs discontinuity
Universal vs context-specific development
The Biopsychosocial Framework
- Biological forces (genetic n health related forces that affect development)
- Psychological forces (anythin to do wit mind- cognitive, emotion, personality, perception)
- Sociocultural Forces (interpersonal, societal n cultural factors that affect development)
The Biopsychosocial Framework-
Life-Cycle Forces
Reflect differences in how the same event affects people of different ages.
eg Impact of Alzheimer’s disease on 50 year old versus 85 year old.
Freud -Psychodynamic
Human behaviour largely governed by motives and drives that are internal and often unconscious
development occurs in stages
5 Stages of Psychosexual Development (e.g. 0-1 =weaning)
Erikson’s Psychosocial Theory-Psychodynamic
8 stages
e.g. basic trust vs mistrust
autonomy vs shame
industry n inferiority (learning basic skills n working with others)
Jean Paiget’s cognitive development theory
4 stages
- learning by senses
- pre operational thought (learning bout words n numbers)
- concrete operational thought (developing logic)
- Formal operational thought (being able to think hypothetically)
also the children’s naive theories
life-span perspective
Paul Baltes
focus on later yrs of life
eg vocab n wisdom improves
4 key features Multi-directionality Plasticity Historical context Multiple causation
Selective Optimization with Compensation Model
3 processes
- selection-choosing a goal/task
- compensation (alternative method of achieving goal
- optimisation (=make the best of the situation, balance resources, goals etc )
ALARA
Principle for radiography
= as low as reasonably achievable
Justification-benefit must out weigh risk
Optimisation- quality of image must be optimised wit the lowest practicable dose
Time-time of exposure short as possible
Distance-as large a distance bw the source of radiation n the exposed person as possible
Shielding-where appropriate shieldin is used bw the source of radiation n the exposed person
Collimation
Do accurate alignment of x ray beam to region of interest (ROI)
(To reduce radiation hazard to patient
Key message for radiography
Always dont just rely on one view
Consider other things like angle, distance of patient to machine cos will affect projection (ie the closer the patient, the bigger the magnification)
The denser the tissue- the nicer the Xray eg bone
Xray can hav harmful side effects
(Lymphocytes, spermatogenia (undifferentiated male germ cell), immature RBC (erythroblast), intestinal crypt have high radio sensitivities
Muscle n nerve cells = low sensitivity
Radiograph (X-RAY)
Image on part of body of patient using general radiographic equipment
Radiographic projection
Positioning term describin the path of the xray beam, its entrance n exit pnts eg anterior, posterior, lateral, oblique
Radiographic position
The position of the patient eg supine( person lyin upwards) or prone (lyin flat, face downwards
Attenuation
Process of absorption n scatterin of the x ray beam, reducing the intensity of the beam. (Wat is left of the beam = ‘remnant beam’
Process for xray
Basically in machine we hav anode n cathode,
Cathode releases electrons wich r attracted n go to anode. This releases photons of E.
Photons of E go through body- bits that r not absorbed by body = black on film. Bits that r absorbed= white eg bone
Origin
The muscle’s fixed or proximal (proximal= nearer to center of body or point of attachment) attachment
Insertion
The muscle’s movable or distal attachment
Radioluscent
Very dark on xray
Radio-opaque/radiopaque
Very light/bright on xray
Xray
All info compressed to one ‘slice’
Tomography
Just takes one ‘slice’ of body (only has info for that ‘slice’, unlike xray)
Eg CT, MRI
MRI
Measures response of hydrogen nuclei spin in body to strong electro-magnetic pulse
2 types: T1 and T2
T1
Fat= bright
Fluid, air, muscle= dark
T2
Fat, fluid (brightest) = bright
Air, bone= dark
General principles of radiographic porisiton
General, min of 2 projections (a AP/PA (anterior to posterior) n lateral)
But for joints, need 3 projections (oblique + 2 above)
For long bones
Dont accept images witout joints
limb embryology stages
1. By end of 4th week: • Upper limb buds (but not lower) 2. In week 5: • Lower limb bud 3. In week 6: • Digits rays in hands n feet 4. In week 7: • Ossification begins 5. In week 8: • Arms bent at elbow • Fingers separate