Atlas de Anatomia do Corpo Humano - Central

The atlas of human body

Pelvic Floor
Pelvic Floor

Soft tissue formed mainly by the pelvic diaphragm, which is composed of the two levator ani and two coccygeus muscles. The pelvic diaphragm lies just below the pelvic aperture (outlet) and separates the pelvic cavity from the PERINEUM. It extends between the PUBIC BONE anteriorly and the COCCYX posteriorly.

Muscles
Muscles

Contractile tissue that produces movement in animals.

Muscle Fibers
Muscle Fibers

Large, multinucleate single cells, either cylindrical or prismatic in shape, that form the basic unit of skeletal muscle tissue. They consist of a soft contractile substance enclosed in a tubular sheath. They are derived from the fusion of skeletal myoblasts (MYOBLASTS, SKELETAL) into a syncytium, followed by differentiation.

Myofibrils
Myofibrils

Highly organized bundles of actin (=ACTINS), MYOSINS, and other proteins in the cytoplasm of skeletal and cardiac muscle cells that contract by a sliding filament mechanism.

Muscle, Skeletal
Muscle, Skeletal

A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles.

Stapedius
Stapedius

A tiny muscle that arises from the posterior wall of the TYMPANIC CAVITY of MIDDLE EAR with its tendon inserted onto the neck of the STAPES. Stapedius pulls the stapes posteriorly and controls its movement.

Rotator Cuff
Rotator Cuff

The musculotendinous sheath formed by the supraspinatus, infraspinatus, subscapularis, and teres minor muscles. These help stabilize the head of the HUMERUS in the glenoid fossa and allow for rotation of the SHOULDER JOINT about its longitudinal axis. Shoulder Impingement Syndrome;

Quadriceps Muscle
Quadriceps Muscle

The quadriceps femoris. A collective name of the four-headed skeletal muscle of the thigh, comprised of the rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis.

Abdominal Muscles
Abdominal Muscles

Muscles forming the ABDOMINAL WALL including RECTUS ABDOMINIS, external and internal oblique muscles, transversus abdominis, and quadratus abdominis. (from Stedman, 25th ed)

Respiratory Muscles
Respiratory Muscles

These include the muscles of the DIAPHRAGM and the INTERCOSTAL MUSCLES.

Diaphragm
Diaphragm

The musculofibrous partition that separates the THORACIC CAVITY from the ABDOMINAL CAVITY. Contraction of the diaphragm increases the volume of the thoracic cavity aiding INHALATION.

Intercostal Muscles
Intercostal Muscles

Respiratory muscles that arise from the lower border of one rib and insert into the upper border of the adjoining rib, and contract during inspiration or respiration. (From Stedman, 25th ed)

Neck Muscles
Neck Muscles

The neck muscles consist of the platysma, splenius cervicis, sternocleidomastoid(eus), longus colli, the anterior, medius, and posterior scalenes, digastric(us), stylohyoid(eus), mylohyoid(eus), geniohyoid(eus), sternohyoid(eus), omohyoid(eus), sternothyroid(eus), and thyrohyoid(eus).

Facial Muscles
Facial Muscles

Muscles of facial expression or mimetic muscles that include the numerous muscles supplied by the facial nerve that are attached to and move the skin of the face. (From Stedman, 25th ed)

Pharyngeal Muscles
Pharyngeal Muscles

The muscles of the pharynx are the inferior, middle and superior constrictors, salpingopharyngeus, and stylopharyngeus.

Esophageal Sphincter, Upper
Esophageal Sphincter, Upper

The structure at the pharyngoesophageal junction consisting chiefly of the cricopharyngeus muscle. It normally occludes the lumen of the ESOPHAGUS, except during SWALLOWING.

Laryngeal Muscles
Laryngeal Muscles

The intrinsic muscles of the larynx are the aryepiglottic(us), arytenoid(eus), cricoarytenoid(eus), cricothyroid(eus), thyroarytenoid(eus), thyroepiglottic(us) and vocal(is).

Masticatory Muscles
Masticatory Muscles

Muscles arising in the zygomatic arch that close the jaw. Their nerve supply is masseteric from the mandibular division of the trigeminal nerve. (From Stedman, 25th ed)

Masseter Muscle
Masseter Muscle

A masticatory muscle whose action is closing the jaws.

Temporal Muscle
Temporal Muscle

A masticatory muscle whose action is closing the jaws; its posterior portion retracts the mandible.

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