Notes, summaries, assignments, exams, and problems for Physical Education

Rotation refers to any whole or partial turn through imaginary lines that cross the human body. Main Axes of Rotation: Longitudinal or vertical axis (e.g., spinning). Transversal or horizontal axis (e.g., somersaults). Anthro-posterior axis (e.g., rolling sideways).

Concept and Importance in Exercise

Students must propose rotational defects of the body, keeping in mind that these will represent:

• A new engine problem and an increase in their possibilities and repertoire of motor abilities.
• Precision and therefore the development of general dynamic coordination (and also much balance).
• Its main characteristic is delicacy in body control in space, impulse control to overcome the effects of inertia (the turns) and the action of gravity.
• Also an instrument

**Retrocapsular Orthoses**

Stability Goal: Angled floor redistributes force vectors, increases propulsion time, and provides an antalgic effect.

**Subphalangeal Orthoses**

Aligned with the target, it increases support, stops rolling. Headlamp goal for Dynamo goal cushion, metatarsal, and diminishes impact angle.

**Hardness**

• Crosslinking Time: Maximum 30-60 minutes, decreased 12-24 hours, lasts 3-4 weeks (defined). The same values apply to a maximum duration of 20 minutes.
• Catalyst Quantity: Double the amount of catalyst for softer silicones increases the maximum, but the definition varies. Do not crosslink before.
• Type of Paste: Paste is less than the maximum duration, crosslinked slower. Half paste (slow catalyzation) lasts less than the maximum

The Role of Memory in Intellectual Development

Memory is an important factor in intellectual development, influencing thought processes and information processing. Vygotsky considered the relationship between thought and memory, stating that for a young child, "to think means to remember." Current studies focus on the theoretical and evolutionary aspects of storage, coding, and retrieval. These are important from an educational point of view as they allow us to understand different memory strategies in children's short-term memory.

Short-term memory allows us to retain data briefly. For example, a child may remember the mobile toy immediately after seeing it. However, if strategies are not used to retain the information, it will be forgotten.... Continue reading "Memory, Cognition, and Psychomotor Development in Early Childhood" »

Math Operations

Operations with Parentheses

Perform multiplications and divisions first, then additions and subtractions. When simplifying fractions, the greatest common divisor should be used to reduce both the numerator and the denominator.

Expressing Fractions as Decimals

When the decimal is purely periodic (e.g., n = 235.2): The numerator is the number without the decimal point minus the non-periodic part, and the denominator is as many 9s as there are figures in the period.

When the decimal is mixed periodic (e.g., 1.372): The numerator is the number without the decimal point minus the non-periodic part. The denominator consists of as many 9s as there are periodic figures followed by as many 0s as there are non-periodic figures after the decimal... Continue reading "Math Operations" »

Funcionamiento de la Suspensión Hidractiva

La suspensión hidractiva es capaz de variar la amortiguación y la flexibilidad, evitando el balanceo parcial o dinámico que se produce habitualmente en la suspensión tradicional. Sus ventajas funcionales permiten disponer de dos estados principales:

• Estado Elástico (Muelle): Permite una menor rigidez al regular la circulación del líquido hidráulico entre los elementos de suspensión.
• Estado Firme: Este estado de rigidez impide, mediante el regulador, los movimientos del líquido hidráulico entre los elementos de suspensión de un mismo eje.

Electroválvula de Mando Hidractiva

Accionada electrohidráulicamente, su función es activar el regulador de rigidez. La unidad de control de informaciones... Continue reading "Suspensión Hidractiva y Sistema SC/CAR: Funcionamiento" »

Dorsal Interossei Muscles

The Dorsal Interossei are intrinsic muscles of the hand. Their origin (O) is located on the adjacent sides of the metacarpal bones, specifically the dorsal half of the metacarpals looking toward the axis of the hand. Their insertion (I) is at the first phalanx and the dorsal aponeurosis of the fingers. Their primary action (A) includes flexion of the metacarpophalangeal joints and acting as separators (abductors) for the fingers around the middle finger axis. They are innervated (IN) by the ulnar nerve (C8-T1). Related structures (R) include the abductor pollicis and lumbricals.

Palmar (Ventral) Interossei Muscles

The Palmar (Ventral) Interossei have their origin (O) on the ventral half of the 2nd, 4th, and 5th metacarpals.... Continue reading "Hand Muscle Anatomy: Interossei, Lumbricals, and Thenar" »

What is Strength?

Strength is the capacity to overcome resistance through muscular action.

Types of Strength

• Force-Resistance: Capacity used for multiple repetitions against prolonged resistance. Loads are light/medium.
• Explosive Force: Capacity to overcome a load with muscle contraction velocity. Done in the shortest time possible.
• Maximum Force: Capacity to oppose a maximum load through voluntary muscle contraction. May involve motion or not.

The Locomotor System

The locomotor system is formed by bones, muscles, and joints. Muscles cover bones. They are formed by fascicles, muscle fibers, myofibrils, and myofilaments (actin and myosin). The function of an agonist muscle is to stretch when its antagonist contracts.

Muscle Contractions

Types of Contractions

• Concentric

General Adaptation Syndrome (GAS) and Supercompensation

The body's response to stress, such as physical exercise, follows a predictable pattern known as the General Adaptation Syndrome (GAS). This process involves a series of reactions designed to overcome fatigue and adapt to a higher level of equilibrium.

Phases of General Adaptation Syndrome

• Alarm Phase: The initial reaction to a new or increased stressor, causing an imbalance in the body.
• Resistance Phase: The body attempts to adapt and cope with the stressor, leading to improved function.
• Exhaustion Phase: If the stress is too prolonged or intense, the body's resources become depleted, leading to fatigue and potential decline in performance.

The Supercompensation Phenomenon

Following the resistance... Continue reading "Optimizing Physical Performance: Principles and Training Methods" »

Elbow

• Flexion
• Extension
• Hyperextension
• Supination
• Pronation

Wrist

• Flexion
• Extension
• Hyperextension
• Abduction (left direction)
• Circumduction

Knee

• Flexion
• Slight rotation in flexion
• Extension

Ankle

• Flexion
• Extension
• Abduction
• Eversion
• Inversion

Keystone

(L) Between the neck and the manubrium. (F) Shrugging; works with other muscles to bring the head forward, backward, and to either side.

Sternocleidomastoid

(L) Front side of the neck. (F) Moves the head forward and rotates it; helps with inspiration; joins the skull to the clavicle and sternum.

Deltoid

(L) Upper arm. (F) Raises the arm to shoulder level and helps move it above the head.

Brachial Biceps

(L) Upper arm. (F) Flexes the arm and forearm; aids in wing attachment and detachment to the body's side.

Triceps Brachii

(... Continue reading "Muscles and Joints: Location and Function" »

Ancient Egyptian Masterpieces

The Wood Sculpture of Hesy-Ra

The wood sculpture of Hesy-Ra (2668–2589 BC), standing at 114 cm and exhibited at the Egyptian Museum in Cairo, follows a system of harmonious proportions that offers a perfect chord between its parts. The fist serves as the regulator module, establishing a perfect length of 18 cuffs: 2 for the face, 10 from the shoulders to the knees, and the remaining 6 for the legs and feet. The Law of Frontality is also evident in this sculpture, representing the straight line of the shoulders and hips. This approach allows the figure to be divided vertically into two halves, presenting a rectilinear vision. The Egyptians believed all figures were composed of four points: front, back, and two sides.... Continue reading "Masterpieces of Ancient Egyptian and Greek Art" »