ɪts ɡɹˈeɪ sˈʌbstəns ɪz kˈɑːnfluːənt əbˌʌv wɪð ðæt ʌvðə kˈɔːɹpəs stɹaɪˈɑːɾəm, ænd ɪz pˈɜːfɚɹˌeɪɾᵻd æntˈiəɹɪɚli baɪ nˈuːmɚɹəs smˈɔːl blˈʌd vˈɛsəlz ðæt səplˈaɪ sˈʌtʃ ˈɛɹiəz æz ðɪ ɪntˈɜːnəl kˈæpsjuːl.
Its gray substance is confluent above with that of the corpus striatum, and is perforated anteriorly by numerous small blood vessels that supply such areas as the internal capsule.