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Biomechanics 1 final exam USAHS with Verified solutions| Rated A+
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Biomechanics 1 final exam USAHS with Verified solutions| Rated A+
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Biomechanics 1 final exam USAHS withVerified solutions| Rated A+
What are the four types of heel-strikes? - ✔✔Splatfoot, rearfoot, midfoot, and forefoot
How is the first ray involved in triplanar motion? - ✔✔Peroneus longus attaches to the first ray
Screw home mechanism of the knee - ✔✔As the length of the medial femoral condyle is longer than
the length of the lateral condyle, the tibia rotates externally about 15° on the femur during the last 20°
of extension.
Genu varum vs genu valgum - ✔✔Varum- bow legged
Valgum- knock kneed
Coxa vara vs coxa valga - ✔✔Vara- <120
Valga- >135
Normal is 120-135
_____ ___________ of anteversion is normal. Any less is considered retroversion and anymore is
considered excessive anteversion. - ✔✔12-15 degrees
True or false:
8 degrees of anteversion is considered retroversion. - ✔✔True
Tight hip flexors pull the pelvis into a(n) __________ tilt. - ✔✔Anterior
What muscles IR the hip? Which is most powerful? - ✔✔TFL, gracilis, glute med/min, and the
adductors (not sure most powerful i think add mag)
, What muscles ER the hip? Which is most powerful? - ✔✔Glute max is most powerful
Glute max, piriformis, obturators, gemelli, quadratus femoris
True or false:
The piriformis is an ER until 90 degrees of hip flexion then it becomes an IR. - ✔✔True
Actions of glute medius - ✔✔Abduction and IR of the hip (superior gluteal L4, L5 S1)
During a forward bend the glute max contracts _____________. - ✔✔Eccentrically
At what degree do the hip and knee experience the most external torque in a squat? - ✔✔
Trendelenburg gait - ✔✔Weak abductors, particaularly glute med. causes leaning toward weak
side during gait
Other deviations - ✔✔
Vaulting gait - ✔✔
Subtalar closed chain pronation - ✔✔Midfoot: pronated
Forefoot: supinated
A ___________ foot is more rigid. - ✔✔Supinated
What are the traditional and rancho terms for the swing phase? - ✔✔Traditional-
acceleration, midswing, deceleration
Rancho los amigos- initial swing, midswing, terminal swing
What are the ground reaction forces during the heel-strike (initial contact) phase? -
✔✔Ankle plantarflexion, knee extension, hip flexion
What are the ground reaction forces during the foot-flat (loading response) phase? -
✔✔Ankle plantarflexion, knee flexion, hip flexion
What are the ground reaction forces during the mid-stance phase? - ✔✔Ankle dorsiflexion,
knee extension, hip extension
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