Ideal Posture Flashcards
ideal alignment places the LoG where?
- through external auditory meatus
- midway through shoulder
- slightly posterior to center of hip joint
- slightly anterior to axis of knee joint
- slightly anterior to lateral malleolus
what type of external moment is seen at the ankle joint?
dorsiflexion
what type of internal moment is seen at the ankle joint?
plantarflexion
do any passive structures contribute to the ankle’s internal moment?
no
what active structures contribute to the ankle’s internal moment?
active contraction of soleus with contribution from gastroc
what type of external moment is seen at the knee joint?
extension
what type of internal moment is seen at the knee joint?
flexion
how does the internal moment at the knee joint prevent knee hyperextension?
- passive tension of posterior joint capsule and associated ligaments
- active contraction of hamstrings and gastroc
what type of external moment is seen at the hip joint?
extension
at times, postural sway may cause LoG at the hip to pass ____ and create an external ____ moment
- anterior
- flexion
what type of internal moment is seen at the hip joint?
flexion
what creates the internal moment at the hip joint?
- passive tension of hip ligaments
- active contraction of iliopsoas
LoG passes through the body of L5, causing a slight ____ moment and ____ force
- extension
- shear
what structures oppose the shear force at the lumbosacral joint?
- anterior longitudinal ligament
- iliolumbar ligament
- facet joint approximation
what type of external moment is seen at the head and neck?
flexion of c-spine
what type of internal moment is seen at the head and neck?
extension of c-spine
what creates the internal moment at the head and neck?
- passive tension of ligamentum nuchae, tectorial membrane, and posterior facet joint capsules
- active contraction of cervical extensors
where is the midline found in ideal standing posture (posterior view)?
head, spine, feet evenly spaced
how are the scapulae oriented in ideal standing posture (posterior view)?
- scapulae lie flat on thorax
- approx. b/w T2 and T7
- approx. 4 in apart
shoulder ipsilateral to handedness is often ____
lower
alignment of knees in ideal standing posture (anterior view)
- patellae face directly forward
- slight physiological valgus
alignment of ankles in ideal standing posture (anterior view)
- neutral
- not supinated or pronated
alignment of feet in ideal standing posture (anterior view)
- heels separated by about 3 in
- out-toeing 8-10 degrees
ASIS should be ____ in ideal standing posture (anterior view)
in line
