Table 3.5 – Sacral Plexus Common fibular nerve innervation: biceps femoris short head Deep fibular nerve innervation: dorsal surface of foot, anterior leg muscles (list 3) Superficial fibular nerve innervation: lateral compartment of leg
Table 4 – Extrinsic Eye Muscles Inferior oblique Inferior rectus Superior rectus Lateral rectus Superior oblique (Medial rectus next slide) Accessory Structures: Orbital fat pad, Palpebra
Table 7 (8) Structure of Cochlea and Spiral Organ Cochlear branch of CNVIII Bony cochlea Scala vestibuli, scala media, scala tympani Spiral organ: basilar membrane, hair cells, tectorial membrane, vestibular membrane
Table 7 (8) Structure of Cochlea and Spiral Organ Cochlear branch of CNVIII Bony cochlea Scala vestibuli, scala media, scala tympani Spiral Organ of Corti: basilar membrane, hair cells, tectorial membrane, vestibular membrane
For review: 3 regions make the whole.
6:45 YouTube video explains how parts work together. Helps students learn anatomical location relative to hearing. https://www.youtube.com/watch?v=PeTriGTENoc
Table 4 – Accessory Structures
Activity 8-spinal cord-eye-ear-2
Spinal Cord, Spinal Nerves,
& Sensory Organs
Chapters 16 & 19 – McKinley et al., Human Anatomy, 4e.
• Identify structures in the gross anatomy of the spinal cord on
both models and cadavers or wet specimens.
• Identify structures in the cross section of the spinal cord on
• Identify the nerve plexuses and specific nerves from each.
• Identify structures from the human eye on models.
• Dissect a cow eye and identify the structures listed.
• Identify structures of the ear on classroom models.
• Histology: Observe and identify structures in a histology slide of
1Compilation: Lisa Radmall
Spinal Cord: Meninges & Spaces
Spinal Nerves: Plexuses
• All ventral rami except T2-T12 form interlacing nerve networks called
• Major nerve plexuses are found in the cervical, brachial, lumbar, and
sacral regions of the spinal cord.
• Each resulting branch of a plexus contains fibers from several spinal
• Thoracic spinal nerves T2-T12 do not form a plexus; branch to intercostal
• You will be responsible to know the listed nerves and (only) the muscles
they innervate from your muscle anatomy labs.
Sensory Organ: The Ear
The ear is composed of three regions: the external ear, located mostly on
the outside of the head, and the middle and inner ear, which are housed
within the petrous portion of the temporal bone