from The Century Dictionary.

  • noun In anatomy, accessory, or an accessory. Applied


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  • B, and the flexor accessorius, E, to gain the inner borders of the muscles of the little toe; from this place it curves deeply inwards between the tendons of the long common flexor of the toes, F f f, and the tarso-metatarsal joints, to gain the outer side of the first metatarsal bone, H, Plate 68, Figure 2.

    Surgical Anatomy

  • Peronæus accessorius, origin from the fibula between the longus and brevis, joins the tendon of the longus in the sole of the foot.

    IV. Myology. 8c. The Muscles and Fasciæ of the Leg

  • The Accessory Obturator Nerve (n. obturatorius accessorius) (Fig. 823) is present in about 29 per cent. of cases.

    IX. Neurology. 6d. The Lumbosacral Plexus

  • The Iliocostalis dorsi (Musculus accessorius) arises by flattened tendons from the upper borders of the angles of the lower six ribs medial to the tendons of insertion of the Iliocostalis lumborum; these become muscular, and are inserted into the upper borders of the angles of the upper six ribs and into the back of the transverse process of the seventh cervical vertebra.

    IV. Myology. 6. The Fasciæ and Muscles of the Trunk. a. The Deep Muscles of the Back

  • They are known as accessory spleens (lien accessorius; supernumerary spleen).

    XI. Splanchnology. 4g. The Spleen

  • The Accessory Meningeal Branch (ramus meningeus accessorius; small meningeal or parvidural branch) is sometimes derived from the preceding.

    VI. The Arteries. 3a. 2. The External Carotid Artery

  • The Extensor carpi radialis accessorius is occasionally found arising from the humerus with or below the Extensor carpi radialis longus and inserted into the first metacarpal, the Abductor pollicis brevis, the First dorsal interosseous, or elsewhere.

    IV. Myology. 7e. The Muscles and Fasciæ of the Forearm

  • —Flexor accessorius longus digitorum, not infrequent, origin from fibula, or tibia, or the deep fascia and ending in a tendon which, after passing beneath the laciniate ligament, joins the tendon of the long flexor or the Quadratus plantæ.

    IV. Myology. 8c. The Muscles and Fasciæ of the Leg

  • The Trapezius and Sternocleidomastoideus arise in the lateral occipital region as a common muscle mass, into which at a very early period the nervus accessorius extends and as the muscle mass migrates and extends caudally the nerve is carried with it.

    IV. Myology. 2. Development of the Muscles

  • The Quadratus plantæ (Flexor accessorius) is separated from the muscles of the first layer by the lateral plantar vessels and nerve.

    IV. Myology. 8e. The Muscles and Fasciæ of the Foot


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  • A muscle reinforcing the action of another.

    December 31, 2007