Cervical-1 Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
Craniovertebral Region | - Occipute, atlas, axis & supporting ligs - 25% of vertical height - Injuries here can involve brain, brainstem, spinal cord |
C-S region (vertebrae #s) | C3-C7 |
Facet alignment: C-S | - 45 degrees from frontal & horizontal planes - Allows Flex/Ext - Coupling (SB & Rot) always ipsilat |
Facet alignment: T-S | - 20 to 30 degrees off frontal plane - Allows for side Flex & Rot (less for Flex/Ext) - T10-12: aligns more in sagittal plane allows more flex/ext - Varied coupling |
Facet alignment: L-S | ◦ L-shaped facets ◦ Ideal for Flex/Ext ◦ Resist Rot |
C-S variations bc of diff needs and stresses | - 1st C&T, 5th L, & sacral vert have adaptations needed to join to adjacent structures ◦ Transitional vert: CT, TL, L-S junction (qualities common in 2 regions) - Incr size from cephalad to cauda = need for incr WB - C1 described as a washer |
Typical vs Atypical C vert | - Typical C3-C6 - Atypical C1,C2,C7 |
Articular facets are oriented __________ and permit a ______ ROM. | obliquely, large |
Facet jt: classification & capsular pattern | - Synovial plane jt (diarthrodial) - C,T,L: Side Flex & Rot equally limited, Ext |
OA jt: classification & capsular pattern | - True synovial, with fibroadipose meniscoid. Nearly in horizontal plane - Ext & Rot equally limited (?) |
Ligamentum Nuchae: | -Not really a lig -Powerful anti-shear mechanism due to fiber arrangement -C-S: it's an extension of supraspinous lig -Attachment for post neck mms -Elastic component -> passively assist in head control and return energy to the system |
Cruciate ligs | maintain stability at the occipital-C1-C2 articulations |
Transverse lig | has a thin layer of articular cartilage for dens |
Alar ligs | - Limit Flex & axial Rot of C1 on C2 - Runs sup & laterally attaches med to occipital condyle - Taut in Rot, contralat taut in SB, & resists distraction |
C1 - Atlas | - Meant to transmit forces occiput to rest of spine - No body - No SP -> incr in potential for craniovertebral Ext - Acts as washer: no ms attachment, less lig attachment - Glides contralat with Rot, ipsilat with SB of head |
OA jt | -Nearly horiz, few mm mvt -Kidney shape concave facet for convex occ condyle -Only 1 glide: diagonal -Flex/Ext: Ant roll, post glide (B condyles) ◦ SB/Rot: always contralat coupling. With R Rot, R condyle glides post & L ant, and L SB (never alone) ◦ |
AA jt | - Dens pivots on post arch Atlas - Lat facets are biconvex (C1/C2), tilt with Flex/Ext, inf glide of C1 on C2 with Rot |
Mvt range of nodding motion | 10-30 degrees |
Rot biomechanics | - AA ROM in ipsilat Rot = 45 (32–47) - AA Rot contributes ~55% of total ROM of C region. - Dysfunction of 1st vert will present as significant loss of C Rot - With R Rot, R condyle of C1 glides post & inf, L condyle glides ant & inf (Both inf) |
Lower Cervical Biomechanics | -C IV disc is unique - Clefts in disc develop into Unncovertebral joints (U-Joints) -Both translation and sagittal plane Rot occur in lower C region -C2-6 ipsilat coupling of SB&Rot -Flex: B upslide -Ext: B down slide -R SB: R down slide & L upslide |
OA jt ROMs (Flex, SB, Axial Rot) | - Flex: 15-20 degrees - SB: 9 degees to B sides - Axial Rot of 0 (8 degrees if forced) |
AA jt ROMs (Flex, Ext-limited, SB) | -With Rot, ipsilat condyle slides post, contralat condyle moves ant. Both slide inf along convex surface telescoping head downward -Flex variable. ~10 degrees -Ext limited by ant arch of C1 -Flex limited by tectoral membrane -SB is ~5 degrees |
Rotexion biomechanics | - OA contralat coupled - AA ipsilat coupled - C2/3 ipsilat coupled |
Latexion biomechanics | - OA contralat coupled - AA contralat coupled - C2/3 ipsilat coupled |
Created by:
neej
Popular Physical Therapy sets