Leonardo da Vinci was an undisputed genius, but also a master of unfinished projects. His notebooks are filled with brilliant ideas that he never completed. Historians and psychologists from King’s College London have suggested that he may have exhibited traits consistent with ADHD, along with episodes of melancholy.
His case could be a prime example of a little-known reality: ADHD rarely occurs in isolation. It is often accompanied by other emotional, behavioral, or learning difficulties that amplify its effects and complicate the daily lives of those who suffer from it, although this does not necessarily imply a limitation.
What are the main problems associated with ADHD?
Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by a persistent pattern of inattention, hyperactivity, and impulsivity that affects daily life in multiple areas. It begins in childhood and, in many cases, continues into adulthood.
1. Oppositional Defiant Disorder
Oppositional defiant disorder (ODD) is a pattern of disobedient, hostile, and defiant behavior toward authority figures, a problem that goes beyond the boundaries of normal childhood behavior. It affects approximately 60% of children with attention-deficit/hyperactivity disorder (ADHD), especially boys.
These children are often stubborn and don’t follow rules. They tend to lose their temper easily, argue with adults, and refuse to obey. In fact, they may even deliberately annoy people, blame others for their mistakes, and be resentful, bitter, and even vindictive.
However, in the context of ADHD, oppositional behavior is not usually an isolated behavioral problem, but rather the result of a combination of impulsivity, low frustration tolerance, and difficulty regulating emotions. When the environment responds only with punishment or confrontation, the conflict intensifies, and a vicious cycle of defiance, anger, and mutual rejection becomes entrenched.
In fact, if oppositional defiant disorder is not addressed early, it can increase the risk of developing into more serious behavioral problems in adolescence, as well as seriously damaging family, school, and social relationships. The most effective intervention usually combines parent training with consistent parenting strategies and therapeutic work on emotional regulation, since it is not just about getting the child to obey, but about teaching them skills to manage frustration, understand boundaries, and relate more appropriately to authority figures.
2. Learning difficulties
Around 45% of children with Attention Deficit Hyperactivity Disorder (ADHD) also have learning difficulties, making it one of the most common comorbidities. This is actually an unexpected challenge, given that the general intelligence of children with ADHD is not usually low.
Even so, they may have difficulty understanding certain sounds or words and expressing themselves. At school, they may behave like younger children or struggle with reading, spelling, and arithmetic. In fact, dyslexia is another fairly common problem associated with ADHD.
The child may understand the content, but struggles to retain instructions, keep up with the class, or integrate information step by step. This leads to seemingly “inexplicable” mistakes, frequent forgetfulness, and a constant feeling of falling behind, which is often misinterpreted as a lack of effort or disinterest.
Over time, if these difficulties are not identified and specifically addressed, they can have a significant emotional impact. Repeated academic failures often erode self-esteem, increase frustration, and foster anxiety about schoolwork. Therefore, early intervention that combines psychoeducational support, classroom adaptations, and individualized strategies not only improves academic performance but also acts as a key protective factor for the child’s emotional well-being.
3. Anxiety
The relationship between Attention Deficit Hyperactivity Disorder (ADHD) and anxiety is particularly close and often bidirectional. A study conducted at the University of Rome indicated that 25% of people with ADHD also develop some form of anxiety disorder during their lifetime. In many cases, anxiety does not appear as an independent problem, but rather as a progressive response to the persistent difficulties with attention, organization, and impulsivity that ADHD imposes on daily life.
In fact, anxiety often develops after years of repeated experiences of academic failure, interpersonal conflicts, or constant criticism. Children and adults with ADHD learn to anticipate mistakes, rejection, or disapproval, leading to excessive worry before undertaking tasks that require sustained attention. This anticipatory anxiety can be mistaken for a lack of motivation or avoidance, when in reality it acts as a defense mechanism against accumulated frustration.
From a neuropsychological perspective, both disorders share alterations in the brain circuits involved in emotional self-regulation and executive control, especially in the prefrontal cortex. While ADHD makes it difficult to filter stimuli and prioritize information, anxiety introduces a state of constant hypervigilance. The result is an overloaded mind, with difficulties concentrating, making decisions, and switching off, which can intensify the symptoms of both disorders.
When anxiety coexists with ADHD and is not specifically addressed, the functional impact is multiplied. Fear of making mistakes reduces initiative, increases procrastination, and reinforces avoidance of responsibilities, creating a vicious cycle that perpetuates both inattention and anxiety. Therefore, the most effective approach is usually comprehensive, combining psychological intervention focused on emotional regulation, organizational strategies, and, when indicated, pharmacological treatment tailored to both conditions.
References:
Fuller, E. et. Al. (2022) Generalized anxiety disorder among adults with attention deficit hyperactivity disorder. Journal of Affective Disorders; 299: 707-714.
D’Agati, E.; Curatolo, P. & Mazzone, L. (2019) Comorbidity between ADHD and anxiety disorders across the lifespan. Int J Psychiatry Clin Pract; 23(4): 238-244.
Catani, M. & Mazzarello, P. (2019) Grey Matter Leonardo da Vinci: a genius driven to distraction. Brain; 142(6): 1842–1846.
Noordermeer, S. et. al. (2017) Risk factors for comorbid oppositional defiant disorder in attention-deficit/hyperactivity disorder. Eur Child Adolesc Psychiatry; 26(10): 1155-1164.
DuPaul, G. J. et. al. (2013) Comorbidity of LD and ADHD: implications of DSM-5 for assessment and treatment. J Learn Disabil; 46(1): 43-51.
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