5302 Group II. Function: Depression of arm from vertical overhead to hanging at side (1, 2); downward rotation of scapula (3, 4); 1 and 2 act with Group III in forward and backward swing of arm. ExtrinSic muscles of shoulder girdle: (1) Pectoralis major II (costosternal); (2) latissimus dorsi and teres major (teres major, although technically an intrinsic muscle, is included with latissimus dorsi); (3) pectoralis minor; (4) rhomboid. 5308 Group VIII. Function: Extension of wrist, fingers, and thumb; abduction of thumb. Muscles arising mainly from external condyle of humerus: Extensors of carpus, fingers, and thumb; supinator. Severe 30 20 10 0 5310 Group X. Function: Movements of forefoot and toes; propulsion thrust in walking. Intrinsic muscles of the foot: Plantar: (1) Flexor digitorum brevis; (2) abductor hallucis; (3) abductor digiti minimi; (4) quadratus plantae; (5) lumbricales; (6) flexor hallucis brevis; (7) adductor hallucis; (8) flexor digiti minimi brevis; (9) dorsal and plantar interossei. Other important plantar structures: Plantar aponeurosis, long plantar and calcaneonavicular ligament, tendons of posterior tibial, peroneus longus, and long flexors of great and little toes. Severe Moderately Severe Moderate Slight Dorsal: (1) Extensor hallucis brevis; (2) extensor digitorum brevis. Other important dorsal structures: cruciate, crural, deltoid, and other ligaments; tendons of long extensors of toes and peronei mus 40 30 30 20 10 0 cles. 10 Severe Moderately Severe Moderate Slight NOTE: THE FOOT AND LEG Continued Minimum rating for through-and-through wounds of the foot-10. 5311 Group XI. Function: Propulsion, plantar flexion of foot (1); stabilization of arch (2, 3); flexion of toes (4, 5); Flexion of knee (6). Posterior and lateral crural muscles, and muscles of the calf: (1) Triceps surae (gastrocnemius and soleus); (2) tibialis posterior; (3) peroneus longus; (4) peroneus brevis; (5) flexor hallucis longus; (6) flexor digitorum longus; (7) popliteus; (8) plantaris. Severe Moderately Severe Moderate Slight 5312 Group XII. Function: Dorsiflexion (1); extension of toes (2); stabilization of arch (3). Anterior muscles of the leg: (1) Tibialis anterior; (2) extensor digitorum longus; (3) extensor hallucis longus; (4) peroneus tertius. Severe Moderately Severe Moderate Slight THE PELVIC GIRDLE AND THIGH 40 30 10 5314 Group XIV. Function: Extension of knee (2, 3, 4, 5); simultaneous flexion of hip and flexion of knee (1); tension of fascia lata and iliotibial (Maissiat's) band, acting with XVII (1) in postural support of body (6); acting with hamstrings in synchronizing hip and knee (1, 2). Anterior thigh group: (1) Sartorius; (2) rectus femoris; (3) vastus externus; (4) vastus intermedius; (5) vastus internus; (6) tensor vaginae femoris. Severe Moderately Severe Moderate Slight 5315 Group XV. Function: Adduction of hip (1, 2, 3, 4); flexion of hip (1, 2); flexion of knee (4). Mesial thigh group: (1) Adductor longus; (2) adductor brevis; (3) adductor magnus; (4) gracilis. 5319 Group XIX. Function: Support and compression of abdominal wall and lower thorax; flexion and lateral motions of spine; synergists in strong downward movements of arm (1). Muscles of the abdominal wall: (1) Rectus abdominis; (2) external oblique; (3) internal oblique; (4) transversalis; (5) quadratus lumborum. Severe Moderately Severe Moderate Slight 5320 Group XX. Function: Postural support of body; extension and lateral movements of spine. Spinal muscles: Sacrospinalis (erector spinae and its prolongations in thoracic and cervical regions). Cervical and thoracic region:. Severe Moderately Severe Moderate Slight Lumbar region:. 40 Severe Severe Moderately Severe Moderate Slight 5316 Group XVI. Function: Flexion of hip (1, 2, 3). Pelvic girdle group 1: (1) Psoas; (2) iliacus; (3) pectineus. Severe Moderately Severe Moderate Slight Severe or Moderately Severe 5322 Group XXII. Function: Rotary and forward movements of the head; respiration; deglutition. Muscles of the front of the neck: (Lateral, supra-, and infrahyoid group.) (1) Trapezius I (clavicular insertion); (2) sternocleidomastoid; (3) the "hyoid" muscles; (4) sternothyroid; (5) digastric. 5324 Diaphragm, rupture of, with herniation. Rate under diagnostic code 7346. 5325 Muscle injury, facial muscles. Evaluate functional impairment as seventh (facial) cranial nerve neuropathy (diagnostic code 8207), disfiguring scar idiagnostic code 7800), etc. Minimum, if interfering to any extent with mastication-10. 5326 Muscle hernia, extensive. Without other injury to the muscle-10. 5327 Muscle, neoplasm of, malignant (excluding soft tissue sarcoma)-100. NOTE: A rating of 100 percent shall continue beyond the cessation of any surgery, radiation treatment, antineoplastic chemotherapy or other therapeutic procedures. Six months after discontinuance of such treatment, the appropriate disability rating shall be determined by mandatory VA examination Any change in evaluation based upon that or any subsequent examination shall be subject to the provisions of §3.105(e) of this chapter. If there has been no local recurrence or metastasis, rate on residual impairment of function. 5328 Muscle, neoplasm of, benign, postoperative. Rate on impairment of function, i.e., limitation of motion, or scars, diagnostic code 7805, etc. 5329 Sarcoma, soft tissue (of muscle, fat, or fibrous connective tissue)-100. NOTE: A rating of 100 percent shall continue beyond the cessation of any surgery, radiation treatment, antineoplastic chemotherapy or other therapeutic procedures. Six months after discontinuance of such treatment, the appropriate disability rating shall be determined by mandatory VA examination. Any change in evaluation based upon that or any subsequent examination shall be subject to the provisions of §3.105(e) of this chapter. If there has been no local recurrence or metastasis, rate on residual impairment of function. (Authority: 38 U.S.C. 1155) [62 FR 30239, June 3, 1997] THE ORGANS OF SPECIAL SENSE $4.75 Examination of visual acuity. Ratings on account of visual impairments considered for service connection are, when practicable, to be based only on examination by specialists. Such special examinations should include uncorrected and corrected cen tral visual acuity for distance and near, with record of the refraction. Snellen's test type or its equivalent will be used. Mydriatics should be routine, except when contraindicated. Funduscopic and ophthalmological findings must be recorded. The best distant vision obtainable after best correction by glasses will be the basis of rating, except in cases of keratoconus in which contact lenses are medically required. Also, if there exists a difference of more than 4 diopters of spherical correction between the two eyes, the best possible visual acuity of the poorer eye without glasses, or with a lens of not more than 4 diopters difference from that used with the better eye will be taken as the visual acuity of the poorer eye. When such a difference exists, close attention will be given to the likelihood of congenital origin in mere refractive error. [40 FR 42537, Sept. 15, 1975] $4.76 Examination of field vision. Measurement of the visual field will be made when there is disease of the optic nerve or when otherwise indicated. The usual perimetric methods will be employed, using a standard perimeter and 3 mm. white test object. At least 16 meridians 221⁄2 degrees apart will be charted for each eye. (See Figure 1. For the 8 principal meridians, see table III.) The charts will be made a part of the report of examination. Not less than 2 recordings, and when possible, 3 will be made. The minimum limit for this function is established as a concentric central contraction of the visual field to 5°. This type of contraction of the visual field reduces the visual efficiency to zero. Where available the examination for form field should be supplemented, when indicated, by the use of tangent screen or campimeter. This last test is especially valuable in detection of scotoma. [43 FR 45352, Oct. 2, 1978] of degrees lost is determined at each meridian by subtracting the remaining degrees from the normal visual fields given in table III. The degrees lost are then added together to determine total degrees lost. This is subtracted from 500. The difference represents the total remaining degrees of visual field. The difference divided by eight represents the average contraction for rating purposes. TABLE III-NORMAL VISUAL FIELD EXTENT AT& PRINCIPAL MERIDIANS Temporally Meridian Normal d grees |