Block 11 - Reproduction and the growing child (post-birth) Flashcards
When can a baby smile?
8 weeks
What can hearing loss cause?
Speech delay
8 stages of social skill and behaviour development
Smiling Waving Peek-a-boo Stranger danger Pointing Imaginative play Getting undressed then dressed Toilet training
When are the health visitor check ups?
1 year
2-2.5 year
Define consanguineous
Parents related
6 generic red flags (not age specific)
Regression Not fixing and following Not responding to noise Early hand preference Abnormal tone Persistent toe walking
5 specific red flag symptoms (age specific)
No smile at 8 weeks Not holding objects at 5 months Not sitting at 12 months Not walking at 18 months Not pointing at 2 years
Define developmental delay
Isolated (1 domanin) or global (4 domains)
Define developmental disorder
Skills aquired in a strange order but still moving forward
7 causes of developmental problems
Antenatal insults Cerebral malformation Congenital infection Deprivation/abuse Genetic syndromes Perinatal hypoxia / hypoglycaemia Postnatal meningitis / trauma / metabolic insult
How many centiles must the weight cross to be diagnosed with FTT?
2 centiles
5 causes of FTT
- Inadequate intake (under-nutrition e.g. poor feeding or not given food)
- Inadequate retention (vomiting)
- Malabsorption (CF or short gut)
- Failure to utilise nutrients (renal/liver/metabolism disorder)
- Increased requirements (malignancy, infection, CF)
What do intra-uterine conditions and pubertal hormones influence?
Growth
What are the two classes of FTT?
Organic and non-organic
Explain the different causes and classifications of short stature
Normal e.g. Genetics or late developer
Pathological can be proportionate or disproportionate
- Disproportionate e.g. rickets, skeletal dysplasia,
achondroplasia
- Proportionate can be prenatal or postnatal
- Prenatal e.g. genetics, TORCH, IUGR - Postnatal e.g. reduced GH, hypothyroidism, cushing's, psychological, other system diseases
Define hypertrophy and hyperplasia
Hypertrophy: Increase in cell SIZE
Hyperplasia: Increase in cell NUMBER
Explain the extrinsic and intrinsic pathway of apoptosis
Extrinsic: Death receptors in cell membrane –> CAPASE protein cascade + apoptosis
Intrinsic: DNA damage –> CAPASE protein cascade + apoptosis
When is foetal GROWTH the greatest?
16-20 weeks
What are cartilage stem cells called?
Chondroblasts
Explain how bone is formed
Chondroblasts divide and lengthen bone, they enlarge and signal calcification –> calcified cartilage
Osteoclasts digest cartilage and osteoblasts replace it with bone –> trabeculae
What are the indirect actions of growth hormone mediated by?
What are they similar to
Insulin-like growth factors (IGFs)
Similar structure to insulin
What are the 2 types of IGFs involved in growth?
IGF-1 : Predominant pre-birth ; increased levels cause disproportinate growth
IGF-11 : Increases during childhood ; peaks at puberty then decreases
6 mediators for tissue and organ growth (11)
Growth factor (fibroblast, platelet derived, nerve)
Thyroid and parathyroid hormones
Sex hormones (oestrogen, testosterone, prolacin, placental lactogen)
Insulin
Vitamin D
Glucocorticoids
What are the 2 thyroid hormones called?
T3 and T4
5 roles of the thyroid hormones
Growth Physiological function Protein synthesis in the brain Bone growth and maturation Forms brain neurones, myelinates, branches dendrites
4 causes of insufficient thyroid hormones
Thyroid gland defect
Decrease in Thyroid-Stimuating Hormone
Decrease in Thyrotropin-Releasing hormone
Iodine insufficiency
Which hormone do you give babies with congenital hypothyroidism?
T4
Is cortisol a corticosteroid?
YES
What can increase levels of corticosteroids?
What can this do to growth?
Cushing’s syndrome or therapeutic steroids (e.g. asthma/eczema)
Interferes with bone growth plates
What is somatotrophin?
Growth hormone
How do levels of GH change throughout childhood?
Increase in infancy, plateau in childhood then increases at puberty
How do levels of TH change throughout childhood?
Increased in infancy then slowly declines
What is the most common cause of dwarfism?
Achondroplasia
What mutation causes achondroplasia?
4 impacts
Autosomal dominant mutation causing increased function of the fibroblast growth factor receptor
Reduced ossification
Inhibited proliferation of chondrocytes
Reduced cellular hypertrophy
Early closure of epiphyseal growth plates
What causes acromegaly?
Common cause
Increased secretion of GH at any stage of life
Commonly due to an adenoma of somatotroph cells
Treatment of acromegaly?
Glucose reduces the secretion of growth hormone
What happens in Pituitary Dwarfism?
5 causes
Reduced GH in childhood
Tumour, Infection, Infarction, Head trauma, Vascular malformation
Define panhypopiturism
All pituitary hormones are absent
What happens in Laron dwarfism?
2 characteristics of people
Mimics GH deficiency as there is a mutation in the GH receptor causing it to be unresponsive
Characterised by increased GH and decreased IGF-1
Short stature and appearance
What is the treatment for Laron dwarfism?
Recombinant IGF-1
How does a child's speech and language develop at: 3-6 months 1-2 years 2-3 years 3-4 years 4 years Childhood
3-6 months: babbling
1-2 years: 1-2 words
2-3 years: 2-3 word phrases (telegraphic)
3-4 years: 3-4 word phrases
4 years: Understands and hold conversations
Childhood: Understands sophisticated words and grammar
Give 7 family beliefs which influence children
Values and beliefs Acceptable and unacceptable behaviour Gender roles Beliefs about illness causes Attitudes about transplant and transfusion Birth and death Ways of expressing emotion
6 factors which affect a child’s communication
Hearing or visual impairment Expressive language Receptive language (e.g EFL) Major life events Having a bad day Feeling unwell
Define social desirability
The child’s response may not be true
They may say what they think you would want them to say
What does WHO define as an adolescent?
10-19 years
What does the children’s act state?
Children should be informed and participate in decisions about their future
What does the nature/nurture debate say about the stability of child development?
Nature: Development is stable over time
Nurture: Development can change e.g. traumatic events
What is Bronfenbrenner’s theory?
5 socially organised subsystems that underpin and guide human growth
Made from the microsystem, macrosystem, protective factors and risk factors
What are the 3 predominant functions of emotions?
Adaptation, Communication, Survival
What emotional and social development occurs at: 0-1 year 1-3 years 3-6 years 6-11 years Teen years
0-1 year : Trust / Mistrust
1-3 years : Autonomy /Shame (trying new skills)
3-6 years : Initiative / Guilt (overprotective parenting)
6-11 years : Industry /Inferiority (working with others)
Teen years : Identity / Confusion
3 social and emotional developments in childhood and adolescence
Childhood: Forming relationships; understanding and regulating emotions
Adolescence: Understanding of moral and social conventions, acceptance and identity
Define metacognitive thought
Thinking about thinking
What are the 4 stages of cognitive development?
- Schemes: Basic unit of understanding about the world
- Adaptation: Schemes develop through adjusting by assimilation and accommodation
- Assimilation: Making information compatible with current understanding of the world
- Accommodation: Alteration to incorporate new experiences or information
What are the 4 periods of cognitive development
What age do they develop at?
Sensoriomotor period (0-2 years)
Pre-operational period (2-7 years)
Period of concrete operations (7-11 years)
Period of formal operations (11+ years)
What develops in the sensoriomotor period?
0-1 month: Reflex 1-4 months: Self-investigation 4-8 months: Reaching out 8-12 months: Goal-directed behaviour 12-18 months: Experimentation 18-24 months: Problem solving
What develops in the pre-operational period?
Reasoning and symbolic functions
What develops in the period of concrete operations?
Logical operations applied to concrete problems
What develops in the period of formal operations?
Hypothetical problem solving, testing of hypothesis and validating reasoning
Forming arguments, counter-arguments and reasoning
What was Gardner’s theory?
What was he the first person to state?
Theory of multiple intelligence's First person to state that IQ is not fixed 1. Linguistic 2. Musical 3. Logio-mathematical 4. Spatial 5. Bodily-kinesthetic (athletic) 6. Interpersonal (people) 7. Intrapersonal (yourself) 8. Naturalist (outdoor)
4 signs of social well-being (and dysfunction)
Positive self esteem (negative self esteem)
Communication (withdrawal)
Appropriate social behaviour (inappropriate behaviour)
Rewarding relationships (poor relationships)
4 signs of emotional well-being (and dysfunction)
Stable and secure attachments (unstable and insecure)
Appropriate emotions (inappropriate)
Positive self esteem (negative self esteem)
Happy and optimistic (anxiety and depression)
4 signs of cognitive functioning (and impairment)
Age appropriate (underachievement)
Appropriate progress (lack of expected progress)
Positive or realistic perception of ability (negative or unrealistic)
Opportunities to reach potential (may need special education)
Give 8 examples of psychopathology in children
Childhood schizophrenia Childhood depression Attention deficit disorder Autistic spectrum disorder Specific learning difficulty (e.g. dyslexia) Sensory impairment Homeless/poverty Toxicity (e.g. lead)
What is the difference between cognitive impairment, learning difficulty and specific learning difficulty?
Cognitive impairment: Wide range of problems
Learning difficulty: Global cognitive impairment
Specific learning difficulty: In one area
What is the difference between plasma and serum?
Plasma is blood with no cells
Serum is blood with no cells or coagulation proteins
What does it mean if the blood is orange?
Increased levels of bilirubin
Define selective requesting
4 purposes
Tests carried out on the basis of an individuals clinical situation
Diagnosis, Assess severity, Monitor disease, Detect side effects
What do dynamic function tests test for?
The body’s response to external stimuli
Define analytical variation
Whether you trust that the test gave you the actual results
Define sensitivity
How little of the analyte the test can detect
Define specificity
How good the assay is at discriminating between the required analyte and interfering substances
What is tested for in the liver function tests? (6)
What do they indicate?
Bilirubin: haem breakdown, secreted in bile, increased if blockage
Aminotransferases: ALT+AST (increased in liver damage)
Alkaline phosphatase: Increased with cholestasis
Glutamyltranspeptidase: Increased with cholestasis
Plasma proteins: Decreased in liver disease
Prothrombin time: Coagulation protein (increased in liver disease)
What is the difference between a core and specialised test?
Core: Ions, glucose, Urea, Creatinine, Protein, Bilirubin, Amylase, ALT, AST, Amylase
Specialised: Hormones, Specific proteins, Trace elements, Vitamins, Drugs, DNA, Lipids
What do the blood results look like in someone who is jaundiced?
3 causes
Causes: haemolytic, cholestatic, hepatocellular
Increased bilirubin, ALP and AST
Normal prothrombin time
Bilirubin in the urine
What do the blood results look like in someone who has acute liver disease?
2 causes
Causes: poisoning, hepatic failure
Increased bilirubin, ALP, AST, Prothrombin time
Decreased albumin
What do the blood results look like in someone who has chronic liver disease?
3 causes
Causes: alcoholic fatty liver, bilary cirrhosis, chronic active hepatitis
Increased prothrombin time and cirrhosis
3 causes of lipoprotein disorders
Heart disease, Pancreatitis, Cataracts
How do you measure the levels of LDL and VLDL in the body?
Most plasma cholesterol is present in LDL so plasma cholesterol is an estimate of LDL
Most plasma triglycerides present in VLDL so plasma triglyceride is an estimate of VLDL
Give 4 examples of secondary hyperlipoproteinemias
What do the blood results look like
Toxins
Renal dysfuncion
Metabolic disorders e.g. diabetes, obesity
Hormonal e.g. hypothyroid, pregnancy
Increased VLDL and LDL
Decreased HDL in obesity but increased in pregnancu
What are the 6 metabolic disorders which the newborn screening test looks for?
Phenylketonuria (PKU) Maple syrup urine disease (MSUD) Isovaleric acidemia (IVA) Glutaric aciduria type 1 (GA1) Homocystinuria (HCU) Medium chain acyl-CoA dehydrogenase deficiency (MCADD)
Explain what happens in the metabolic disease PKU
Phenylalanine –> Tyrosine in the liver by PAH (phenylalanine hydroxylase)
No enzyme = increased Phenylalanine = mental retardation