Discuss the methods of assesment of development. Perform development assesment and interpretation. Assesment of child with development delay - Elicit document and present history

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Assessment of Development in Children

1. Foundational Concepts

Developmental assessment is based on the premise that milestone acquisition occurs at a specific rate, in an orderly and sequential manner. It covers five core domains:

Domain	What is assessed
Gross Motor	Posture, balance, locomotion
Fine Motor / Adaptive	Hand use, eye-hand coordination, problem-solving
Language / Communication	Receptive and expressive language, articulation
Social / Emotional	Attachment, play, self-regulation, peer interaction
Cognitive	Learning, thinking, executive function

A Developmental Quotient (DQ) is computed as: DQ = (Developmental Age / Chronological Age) x 100. A DQ < 70% in two or more domains in a child under 5-6 years is called Global Developmental Delay (GDD).

2. Methods of Assessment of Development

A. Developmental Surveillance (Ongoing, Every Visit)

Developmental surveillance is included at every well child visit and involves:

Direct observation of the child
Eliciting and attending to parent/caregiver concerns
Reviewing any risk factors or prior concerns

B. Standardized Developmental Screening

Formal screening tools are administered at 9, 18, and 30 months (or 24 months if 30-month visit is not possible) in the absence of concerns, per AAP guidelines. Concerns at any visit prompt immediate formal screening.

C. Screening Tools (Table 9.3, Harriet Lane Handbook)

Tool	Domain	Age	Completed by	Notes
Ages and Stages Questionnaire (ASQ)	Cognitive and motor development	4-60 months	Parent	Efficient; filled while waiting; documents hard-to-assess milestones
Parents' Evaluation of Developmental Status (PEDS)	Developmental and behavioral problems	0-8 years	Parent	Can also serve as surveillance
Capute Scales (CLAMS + CAT)	Language and visual-motor/problem-solving	3-36 months	Clinician	Gives quantitative DQs for language and adaptive abilities
M-CHAT-R/F	Autism spectrum disorder	16-30 months	Parent	Positive screens require clinician follow-up
CSBS DP (Infant-Toddler Checklist)	Communication and symbolic behavior	6-24 months	Parent	One-page questionnaire; part of larger standardized tool
Childhood Autism Screening Test (CAST)	Autism	4-11 years	Parent	Evaluated in preschool population

D. In-Clinic Assessment Methods

Goodenough-Harris Draw-a-Person Test - cognitive level from figure drawing complexity
Gesell Figures - child copies geometric shapes (circle at 3 years, square at 4, triangle at 5)
Gesell Block Skills - child reproduces block structures built by examiner
Primitive Reflexes Assessment (Table 9.6, Harriet Lane):

Reflex	Elicitation	Response	Normal Timing
Moro ("embrace")	Supine; sudden neck extension, head falls ~3 cm	Extension, abduction of upper extremities, then adduction	Present at birth; disappears by 3-6 months
Galant	Prone suspension; stroke paravertebral area	Truncal incurvature toward stimulated side	Present at birth; disappears by 2-6 months
ATNR ("fencer")	Supine; rotate head 45-90 degrees	Extension of limbs on chin side, flexion on occiput side	Present at birth; disappears by 4-9 months
STNR ("cat")	Sitting; head extension/flexion	Extension of UEs + flexion of LEs (and vice versa)	Appears 5 months; disappears by 8-9 months

Postural Reactions (eTABLE 9.1, Harriet Lane):

Reaction	Age of Appearance	Description
Head righting	6 weeks - 3 months	Lifts chin from tabletop prone
Landau response	2-3 months	Extension of head, trunk, legs when held prone
Derotational righting	4-5 months	Body rotates to follow head direction
Anterior propping	4-5 months	Arm extension anteriorly in supported sitting
Parachute	5-6 months	Arm extension when falling

E. Comprehensive Neurological Examination

Growth parameters (height, weight, head circumference) - reviewed against growth charts
Dysmorphic features, skin (neurocutaneous signs), eyes, hair
Cranial nerve assessment
Tone and strength (hypertonia vs. hypotonia)
Deep tendon reflexes, including asymmetry
Gait, coordination, cerebellar signs
Mental status: eye contact, social reciprocity, communication, behavior

F. Referral for Formal Developmental and Diagnostic Evaluation

Referral to developmental specialists and appropriate subspecialists
Referral to early intervention services for children aged 0-3 years
Genetic evaluation (warranted for all children with developmental delay or intellectual disability if cause is not known)

3. Developmental Milestones and Interpretation

Key Milestones by Age (Harriet Lane / Bradley and Daroff's Neurology)

Age	Social/Emotional	Language	Cognitive	Motor
2 months	Smiles at caregiver	Coos, reacts to loud sounds	Tracks face with eyes	Holds head up prone; opens hands briefly
4 months	Smiles spontaneously to get attention; chuckles	Cooing sounds ("ooo","aahh"); turns toward voice	Looks at hands with interest	Holds head steady; bats at objects; pushes onto elbows
6 months	Recognizes familiar people; laughs	Turn-taking sounds; blows raspberries	Reaches for desired object	Rolls tummy to back; leans on hands sitting
9 months	Stranger anxiety; varied facial expressions	Strings vowels together; "mama/dada" nonspecific	Object permanence	Sits without support; pulls to stand
4 years	Preferred friend; group play; understands deception	300-1000+ words; 100% intelligible; follows 3-step commands	Draws 4-6 part person; counts to 4	Hops on one foot; cuts with scissors; copies square
5 years	Friendships; apologizes for mistakes	2000+ words; responds to "why" questions	Draws 8-10 part person; names 8-10 colors	Skips; uses dynamic tripod grasp

Developmental "Red Flags" (Table 9.4, Harriet Lane)

At any age:

Loss of previously obtained developmental skills (regression)
Parental or professional concerns about vision or hearing
Persistently low muscle tone / floppiness
Asymmetry of movements (suggestive of cerebral palsy)
Head circumference above 99.6th or below 0.4th percentile, or crossing 2 major percentile lines

Age-specific red flags should prompt immediate formal evaluation and referral.

4. Assessment of a Child with Developmental Delay - Eliciting, Documenting, and Presenting History

The Developmental History Framework

A thorough history is the cornerstone of evaluating a child with developmental delay. It must cover seven major domains:

I. Presenting Concern / Chief Complaint

Who raised the concern first (parent, teacher, clinician)?
When was it first noticed?
Which developmental domains appear affected?
Course: static, progressive, or regressive?

Key distinction: Regression (loss of milestones) suggests a neurodegenerative process and is a red flag requiring urgent workup.

II. Prenatal History

Maternal age (<16 or >35 years - risk factor)
Maternal illnesses during pregnancy: infections, diabetes, nephritis, thyroid disease, eclampsia
Maternal medication use: anticonvulsants, anticoagulants
Maternal substance use: alcohol (fetal alcohol spectrum disorder), tobacco, drugs of abuse
Fetal infections (TORCH): congenital CMV, rubella, toxoplasmosis, syphilis, herpes
Quality and regularity of prenatal care
Fetal growth: intrauterine growth restriction (IUGR), polyhydramnios, oligohydramnios
Antenatal ultrasound findings (structural brain anomalies)
Type of conception: natural vs. assisted reproductive technology

III. Birth (Perinatal) History

Gestational age at delivery (prematurity is a major risk factor - periventricular leukomalacia)
Mode of delivery: normal vaginal delivery, instrumental (forceps/vacuum), cesarean - and reason
Complications at delivery:
- Prolonged/obstructed labor
- Prolapsed cord, abruptio placentae
- Breech presentation, midforceps delivery
Apgar scores at 1 and 5 minutes
Need for resuscitation at birth (bag-mask, intubation, CPR)
Neonatal complications: hypoxic-ischemic encephalopathy (HIE), neonatal seizures, hyperbilirubinemia/kernicterus, neonatal infections, intracranial hemorrhage

IV. Postnatal/Neonatal History

Abnormal feeding (poor sucking, weight gain, vomiting)
Hypotonia or abnormal cry
Neonatal metabolic screening results (inborn errors of metabolism)
NICU admission and duration
Early infections (meningitis, encephalitis)

V. Developmental Milestone History

Document the age of attainment (or non-attainment) for each domain:

Domain	Key Milestones to Ask About
Gross motor	Rolling, sitting independently, pulling to stand, walking, running, stair climbing
Fine motor	Reaching, pincer grasp, drawing shapes, self-feeding
Language	Cooing, babbling, first words, word combinations, sentence length

Was there a plateau or regression in milestones?
Is the delay in one domain (isolated) or multiple domains (global)?

VI. Medical / Past History

Epilepsy / seizures - type, frequency, EEG findings, medications
Vision impairment - fixation, tracking, strabismus
Hearing impairment - newborn hearing screen results, recurrent otitis media
Ataxia or movement disorder
Sleep impairment
Behavioral problems (hyperactivity, self-injurious behavior, stereotypies)
Recurrent hospitalizations or significant illnesses
Head trauma (non-accidental injury must be considered)
Growth trajectory (failure to thrive, short stature, microcephaly/macrocephaly)
Endocrine: hypothyroidism, Addison disease
Neurocutaneous: neurofibromatosis, tuberous sclerosis

VII. Educational History

Requirement for special education services
Grade retention
Established educational plans (IEP - Individualized Education Plan)
Performance in preschool/school setting
Teacher concerns

VIII. Family History (Three-Generation Pedigree)

This should be the minimum documented (Harriet Lane / Bradley and Daroff):

Neurodevelopmental disabilities in relatives
History of special education services or failure to graduate
Neurodegenerative disorders
Family members who were late talkers or walkers
Multiple miscarriages or early postnatal deaths
Consanguinity
Ethnicity (relevant for recessive conditions)

Use the SIDE mnemonic:

Similar conditions in family?
Inherited conditions?
Deaths (premature, unexplained)?
Extraordinary events?

Or SCREEN mnemonic:

Some concerns about conditions running in family?
Reproduction issues (infertility, birth defects)?
Early disease/death/disability?
Ethnicity?
Non-genetic risk factors?

For specific suspected syndromes, ask targeted questions. For example, if fragile X syndrome is suspected: ask about maternal premature ovarian failure, parkinsonism or ataxia of unknown etiology in the maternal grandfather, and intellectual disability in an X-linked pattern in other family members.

IX. Social / Environmental History

The social history must probe for environmental contributors (Bradley and Daroff's Neurology):

Physical abuse, neglect, or psychosocial deprivation
Family illness or impaired parenting
Sociocultural stressors
Economic status of the family
Access to early stimulation and educational opportunities
Exposure to environmental toxins (lead, heavy metals)

5. Etiology of Developmental Delay by Time of Onset

(Table 8.2, Bradley and Daroff's Neurology)

Timing	Category	Examples
Prenatal	CNS malformations	Lissencephaly, holoprosencephaly
	Chromosomal	Down syndrome (Trisomy 21), Turner syndrome
	Teratogens	Anticonvulsants, anticoagulants, alcohol
	Fetal infections	Congenital CMV, rubella, toxoplasmosis
	Prematurity	Periventricular leukomalacia
Perinatal	Trauma	ICH, spinal cord injury
	Asphyxia	Hypoxic-ischemic encephalopathy
Postnatal	Inborn errors of metabolism	Aminoacidopathies, mitochondrial disease
	Storage diseases	Lysosomal storage diseases, glycogen storage
	Nutritional	Vitamin or calorie deficiency
	Endocrine	Hypothyroidism, Addison disease
	CNS infection	Meningitis, encephalitis
	CNS trauma	Diffuse axonal injury, ICH
	Neurocutaneous	Neurofibromatosis, tuberous sclerosis
	Neuromuscular	Muscular dystrophy, myotonic dystrophy
	Vascular	Stroke, sinovenous thrombosis
	Other	Epilepsy, mood disorders

6. Presenting the History of a Child with Developmental Delay

When presenting a developmental case, use this structured framework:

"[Name] is a [age]-year-old [sex] who was brought by [caregiver] with concern for [chief complaint - e.g., delayed speech, not walking]. The concern was first noted at [age] by [parent/teacher/clinician].

Prenatal history: Born to a [G_P_] mother at [gestational age] weeks via [mode of delivery]. Pregnancy was [uncomplicated / complicated by: __]. No known prenatal exposures to alcohol, tobacco, or teratogens. [Maternal illnesses: __]. Apgar scores were [] and [] at 1 and 5 minutes.

Neonatal history: [NICU admission / no NICU]. [Neonatal complications: ]. Birth weight was []. Newborn metabolic screen was [normal/abnormal].

Developmental milestones: [Rolled at __, sat at __, walked at __, first words at __, sentences at __]. There has been [a plateau/regression/never acquisition] in [domain(s)].

Medical history: [Epilepsy: yes/no]. [Vision/hearing concerns: ___]. Growth trajectory: [weight/height/OFC] on [percentile]. [Other relevant: ___].

Educational history: Attends [school/preschool]. Requires [special services: ___].

Family history: [Three-generation pedigree findings]. [Consanguinity: yes/no]. [Similar developmental issues: ___].

Social history: Lives with []. Primary caregiver: []. [Psychosocial stressors: ___]. [Environmental exposures: ___]."

Summary

Component	Key Points
Surveillance	Every well-child visit; parent concerns and direct observation
Screening	AAP: formal screen at 9, 18, 30 months; tools include ASQ, PEDS, Capute, M-CHAT
Assessment tools	Gesell figures/blocks, Goodenough Draw-a-Person, primitive reflexes, postural reactions
Red flags	Regression, tone abnormalities, asymmetry, microcephaly/macrocephaly, vision/hearing concerns
Delay history	Prenatal -> perinatal -> postnatal -> milestone -> medical -> educational -> family -> social
DQ interpretation	DQ <70% in 2+ domains in child <5-6 years = Global Developmental Delay

Sources:

The Harriet Lane Handbook, 23rd ed. (Johns Hopkins Hospital), Chapter 9 - Developmental and Behavioral Pediatrics
Bradley and Daroff's Neurology in Clinical Practice - Chapter 8: Global Developmental Delay
Kaplan & Sadock's Comprehensive Textbook of Psychiatry - Developmental History sections

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