Upper leg muscles and Thorax
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This document discusses the muscles of the upper leg and thorax. It describes the major muscle groups of the anterior, medial, and posterior thigh, including the quadriceps and hamstrings. Common thigh injuries like hamstring strains are mentioned. Exercise examples provided are leg extensions and hamstring stretches. The thorax section outlines key chest muscles such as the pectoralis major and minor, serratus anterior, and intercostal muscles.
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The document summarizes various muscles of the trunk, including:
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- Pelvic floor muscles like levator ani and coccygeus that form a hammock-like floor across the pelvis.
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website: http://www.am-medicine.com
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Anatomy of thorax
The thoracic wall is comprised of skin, fascia, muscles and bones. It protects the thoracic viscera and enables breathing movements. The bony thoracic cage consists of 12 pairs of ribs connected to 12 thoracic vertebrae and the sternum. There are three types of ribs: true ribs that connect to the sternum, false ribs that connect to ribs above, and floating ribs that do not connect to other bones. The thoracic vertebrae are distinguished by demifacets on the vertebral bodies. The sternum consists of the manubrium, body, and xiphoid process. Openings in the thoracic wall include the superior inlet bounded by the clavicle, first
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Muscles of head, Muscles of face, Muscles of neck, Muscles of shoulder girdle, Muscles of upper limbs, Muscles of thorax, Diaphragm, Muscles of abdomen, Muscles of back, Muscles of perineum, Muscles of pelvis, Muscles of lower limb, Muscles of leg, Muscles of foot
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Origin, Insertion, and action of muscles
Muscle:
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Muscles helps in movement, support and protection of internal organs.
Muscle cells or myocytes contain protein filaments called myofilaments actin & myosin that producing a contraction that changes both the length and the shape of the cell.
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Contractility: this refers to the capacity of a muscle to contract or shorten forcibly when stimulated by nerves and hormones
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Upper leg muscles and Thorax
- 1. Upper leg muscles and Thorax Members: Ricadro Nájera Luis Aguiluz Felipe Sánchez Cristian Bonilla
- 2. Introduction • The upper leg is the region of the body located between the hip and knee joint. This region of the body is comprised of one long bone, the femur, as well as numerous muscles, tendons, and ligaments, including the hamstrings and quadriceps.
- 3. • In clinical anatomy the thigh muscles are divided into three groups: Anterior muscles extend your legs and flex your thighs. Medial muscles adduct and rotate your thigh, and posterior flex your leg and extend your thigh.
- 4. The anterior thigh muscles • The muscles of the anterior part of the thigh include the quadriceps group and a few others.
- 5. The medial thigh muscles • The muscles of the medial part of the thigh include muscles that bring the thigh toward the midline and rotate it.
- 6. The posterior thigh muscles • The three muscles of the posterior thigh are known as the hamstring muscles. They extend the thigh from a flexed position and flex the leg.
- 8. Exercises • Leg Extensions Main target: the quads or quadriceps (the front thighs). • Start with knees bent at 90. • Extend lower legs as far as possible. • Return to starting position under control.
- 9. • Hamstring Stretch It's more effective to stretch one leg at a time, so you're less limited by your pain threshold. Regular Splits Stand with your feet about two shoulder widths apart to each side. Use the hands for support. If you can't place your hands on the floor, then place both hands on a chair seat directly in front of you. Gradually lower yourself into the stretch for one to 1.5 minutes. Feel the stretch in your inner thigh (groin or adductors). Use your hands to press up out of this stretch when finished.
- 11. Thorax
- 12. Pectoralis • The pectoralis minor is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body. • The pectoralis major is a thick, fan-shaped muscle, situated at the chest of the human body. It makes up the bulk of the chest muscles in the male and lies under the breast in the female.
- 13. Serratus anterior and Intercostals • The Serratus anterior muscle is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula. • Intercostal muscles are several groups of muscles that run between the ribs, and help form and move the chest wall. The intercostal muscles are mainly involved in the mechanical aspect of breathing. These muscles help expand and shrink the size of the chest cavity when you breathe.
- 15. Abdominal