primitive reflex

primitive reflex

any of various simple, stereotypic, automatic neuromuscular responses characteristic of the mature fetus and newborn but typically inhibited during the first year of life; primitive reflexes are directed by brainstem centers and include the startle (Moro), rooting, and tonic neck reflexes; abnormal persistence can lead to clumsiness, incoordination, and perceptual difficulties.
Farlex Partner Medical Dictionary © Farlex 2012

prim·i·tive re·flex

(prim-i'tiv rē'fleks)
Any of a group of reflexes seen during gestation and infancy that typically become integrated by an early age (most by 6 months); also seen in adults who have sustained an injury or acquired a disease of the central nervous system.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Retention of TLR restricts the side-lying, roll-over, creeping and lying to seated ability of the child.7 In developmentally-delayed child, like CP, TLR retention causes the increased flexor tone with the child in prone lying position.8 While there is most likely increase in extensor tone in CP child with supine lying positioning, it leads to stereotypical movements as tonic reflexes are retained at brainstem level.9 This retention of primitive reflex make the CP child uncomfortable in seated position and indirectly has a marked effect on the attention span and learning skills of the child.9
Well, you're not being a wuss, you're responding to a primitive reflex buried deep in your brain, Fainting, or "vasovagal syncope" happens when our blood pressure drops, for a variety of reasons.
The grasp reflex is a primitive reflex that may reappear in the presence of lesions in the frontal lobe.
It is a primitive reflex in which the adrenal hormones, cortisol and epinephrine, are secreted quickly.
Usefulness of primitive reflex in demented and non-demented cerebrovascular patients in daily clinical practice.
They explain this phenomenon to be due to a loss of cortical control which in turn causes expression of a primitive reflex, i.e.
Gait features and associated findings in patients with AD and controls Patients with AD Controls No.(%) (n = 55) No.(%) (n = 55) Disequilibrium mild 23 (42) 17 (31) moderate 8 (15) 3 (5) severe 1 (2) 0 (0) any 32 (58) 20 (36)(*) Gait ignition failure 9 (16) 2 (4) Wide-based gait 17 (31) 8 (15) Short-stepping gait 19 (35) 9 (16)(*) Gegenhalten 10 (18) 1 (2)(*) Primitive reflex (any) 7 (13) 1 (2) Webster score > 5 13 (24) 2 (4)(*) Median (range) apraxia score Lower limb 1 (0-3) 0 (0-1) Total 3 (0-8) 0 (0-5)(*) (*) p < 0.05 (McNemar's test or Wilcoxon signed rank test).
Participants were evaluated on five cognitive measures: attention, immediate and delayed memory, ability to Identify visual and spatial relationships among objects, frontal lobe abilities (abstraction, fluency, impulsivity, and primitive reflexes), and the Mini-Mental State Examination--a 30-point cognitive questionnaire.
Early chapters explain how to observe and examine the hand for grasp and manipulation, outline the anatomical structure of the hand as related to grasp, chart the in utero development of the hand, and discuss the primitive reflexes that influence grasp.
Based on a series of movement patterns that facilitate neurological feedback to the brain, carefully designed floor exercises - tailored to the individual patient's needs - inhibit primitive reflexes that have failed to correctly develop in early life or which have been re-released at a later stage through brain injury.
Experts at the University of Nottingham have published research that suggests the human propensity for contagious yawning is triggered automatically by primitive reflexes in the primary motor cortex -- an area of the brain responsible for motor function.