Infant Physical, Sensory, and Perceptual Development Flashcards

Flashcards covering key terms and definitions regarding physical, neurological, sensory, perceptual, and health maintenance concepts in infant development.

Neonate / Newborn

An infant during the first 28 days of life.

Infant

A child in the age range of 28 days to 12 months (or 1 month to 1 year).

Midbrain and Medulla

The most mature brainstem structures at birth that support vital autonomic functions, including respiration, heart rate, and digestion.

Synaptic Pruning

An experience-dependent process that eliminates unused or inefficient neural connections to increase brain processing efficiency.

Adaptive Reflexes

Essential survival reflexes present at birth—such as sucking, rooting, and pupil response—whose absence or weakness indicates potential neurological dysfunction.

Primitive Reflexes

Involuntary reflexes controlled by the midbrain and medulla (such as Moro, Babinski, and palmar grasp) that typically disappear by 6 to 8 months of age.

Babinski Reflex

A primitive reflex elicited by stroking the bottom of the foot, causing the toes to fan out.

Moro (Startle) Reflex

A primitive reflex in which a baby throws their arms outward and arches their back in response to a sudden or loud stimulus.

Palmar Grasp

A primitive reflex where an infant's fingers curl in and grasp an object placed directly in their hand.

Plantar Grasp

A reflex where an infant's toes curl inward when an object is placed on the ball of the foot.

Tonic Neck (Fencing) Reflex

A primitive reflex where turning the infant's head to one side causes the arm on that side to straighten while the opposite arm bends.

Stepping Reflex

A primitive reflex where an infant simulates walking movements when their feet are placed on a flat surface.

Colic

A condition defined as intense crying for more than 3 hours per day, more than 3 days per week, for more than 3 weeks in an otherwise healthy infant.

Quiet Alert State

An awake behavioral state characterized by bright, open eyes and a relaxed body, representing the optimal state for parent interaction and learning.

Proximodistal Development

The pattern of physical and motor development progressing from the center of the body outward.

Cephalocaudal Development

The pattern of growth and motor development that occurs sequentially from the head downward.

Anterior Fontanel

The soft spot on top of an infant's skull that allows for brain growth and typically closes between 12 and 18 months of age.

Posterior Fontanel

The soft spot near the back of an infant's skull that closes at approximately 3 months of age.

Ossification

The process of bone formation and hardening from cartilage.

Pincer Grasp

A fine motor milestone emerging around 9 months of age, involving the coordinated use of the thumb and index finger to grasp small objects.

Visual Acuity at Birth

Newborn visual resolution ranging from 20/200 to 20/400, with optimal focus at a distance of 8 to 10 inches.

Visual Tracking

The ability to smoothly follow a moving object with the eyes, which develops skillfulness between 6 and 10 weeks of age.

Intermodal Perception

The capacity to combine and integrate information from multiple sensory modalities (such as sight, sound, and touch) into a unified experience.

Perceptual Narrowing

A developmental shift occurring after 6 months where infants lose the initial ability to distinguish phonemes from all human languages as they tune into their native language.

Infant Mortality

The death of an infant within the first year of life, reported at 5.61 per 1,000 live births in the United States in 2022 and 7.1 per 1,000 live births in Ohio in 2023.

Sudden Infant Death Syndrome (SIDS)

The sudden and unexplained death of an apparently healthy infant between 1 month and 1 year of age, reduced through safe sleep practices such as back sleeping.

Shaken Baby Syndrome

Severe brain damage and neurological trauma resulting from the violent, forceful shaking of an infant.

Macronutrient Malnutrition

Severe nutritional failure resulting from an overall shortage of calories, leading to severe wasting conditions such as marasmus.

Micronutrient Malnutrition

Nutritional deficiency caused by an inadequate intake of essential vitamins or minerals, such as iron deficiency leading to anemia.

Well-Child Visits

Routine medical examinations recommended every 2 to 3 months during infancy to evaluate growth, physical development, and administer immunizations.